
523 F.3d 24 (2008)
UNITED STATES of America, Appellee,
v.
Antonio MARIN, Defendant, Appellant.
No. 06-1912.
United States Court of Appeals, First Circuit.
Heard August 1, 2007.
Decided April 11, 2008.
*25 Leslie W. O'Brien for appellant.
Paul Hart Smyth, Assistant United States Attorney, with whom Michael J. Sullivan, United States Attorney, was on brief for appellant.
Before BOUDIN, Chief Judge, SELYA, Senior Circuit Judge, and HOWARD, Circuit Judge.
HOWARD, Circuit Judge.
Appellant Antonio Marin ("Marin") was convicted by a jury of possessing a firearm in furtherance of drug trafficking, in violation of 18 U.S.C. § 924(c).[1] On appeal, *26 Marin claims that the evidence was insufficient to prove that the firearm was possessed "in furtherance of" drug activities. He also asserts the trial judge committed reversible evidentiary errors. We affirm.

I. FACTUAL BACKGROUND
We recite the facts in the light most favorable to the jury's verdict. United States v. Isler, 429 F.3d 19, 22 (1st Cir. 2005). During the fall of 2004 the United States Drug Enforcement Administration ("DEA") used a cooperating witness known as "Gijo" to make a series of cocaine purchases from Marin in Springfield, Massachusetts. The first occurred in November, when Gijo purchased 50 grams of cocaine from Marin for $1500 outside a grocery store. After the sale, Marin drove to his home. A month later Gijo purchased an additional "100 to 125" grams of cocaine from Marin for $3700. Marin drove from his home to a car wash to make this second sale. A third sale, in February 2005, involved 50 grams for $1500. Again, Marin arrived at the sale location-a restaurant-from his home.
The DEA arrested Marin on February 24, 2005, the day after the third controlled cocaine purchase. In order to make the arrest, the DEA had Gijo order 100 grams of cocaine from Marin, who drove from his home to the arranged sale point. Marin was arrested upon his arrival, after DEA agents trapped his car with their own vehicles. Although Marin got out of his car brandishing what was described as a two or three foot long billy club, he dropped the club at the demand of approaching agents. A clear plastic bag containing 100 grams of cocaine was found in his pocket. Simultaneous with the arrest, other DEA agents executed a search warrant at Marin's apartment. In a bedroom nightstand, they found 70-75 grams of cocaine, a digital scale and packaging materials. They also found, under the bed mattress, a loaded .38 caliber semiautomatic handgun with a defaced serial number and a spare clip loaded with .38 caliber ammunition. The search yielded $1500 in cash, discovered in a bedroom bureau. Agents also found roughly 700 grams of cocaine in a plastic bucket in the basement. In post-arrest interviews, Marin admitted to DEA agents that all of the cocaine, the gun and ammunition were his, as was the bedroom in which the gun, ammunition and the smaller amount of the cocaine were discovered. He told the agents he had purchased the gun from a cocaine dealer approximately six months prior to his arrest.
The cocaine recovered in Marin's bedroom and basement formed the basis for the charge of possession with intent to distribute, which, in turn, was the predicate drug crime for the firearm count on which Marin was ultimately convicted and which he now appeals.

II. DISCUSSION

1. Sufficiency of the Evidence
Marin argues, as he did at trial,[2] that the government's evidence was insufficient as a matter of law to prove that he possessed the recovered firearm "in furtherance of" his admitted drug dealing. Specifically Marin notes the uncontroverted evidence that he was not seen carrying a gun at any of the arranged deals. Thus, he argues, the only connection between the firearm and the cocaine was the gun's *27 "mere presence" in the bedroom, which, Marin points out, did not even hold the lion's share of the stash. While Marin accurately recounts the two facts he relies on  he was not seen carrying the gun during the subject drug deals, and the significantly greater share of the cocaine was located in another part of the residence  his legal conclusion misses the mark by a wide margin.
In analyzing Marin's sufficiency claim,[3] we must affirm the conviction if after de novo review of the evidence taken in the light most favorable to the government, we conclude that a rational factfinder could find that the government proved the essential elements of its case beyond a reasonable doubt. United States v. Stark, 499 F.3d 72, 79 (1st Cir.2007).
Marin was convicted of violating 18 U.S.C. § 924(c)(1), which prescribes various mandatory punishments for "any person who, during and in relation to any ... drug trafficking crime ... uses or carries a firearm, or who, in furtherance of any such crime, possesses a firearm...." To obtain a conviction, the government must prove beyond a reasonable doubt the defendant: 1) committed a drug trafficking crime; 2) knowingly possessed a firearm; and 3) possessed the firearm in furtherance of the drug trafficking crime. United States v. Delgado-Hernandez, 420 F.3d 16, 24 (1st Cir.2005). Here, there is no dispute that Marin committed a drug trafficking crime and knowingly possessed a firearm. Marin's appellate argument is aimed at the "in furtherance of" requirement.
The "in furtherance of" element does not have a settled, inelastic, definition. See id. (meaning is "fluid"); United States v. Felton, 417 F.3d 97, 104 (1st Cir.2005), cert. denied, 547 U.S. 1048, 126 S.Ct. 1639, 164 L.Ed.2d 349 (2006) (meaning is not "well-settled"). Our cases, however, do provide sufficient guidance for the task here. In the context of a drug trafficking predicate, we have understood "in furtherance of" to demand showing a sufficient nexus between the firearm and the drug crime such that the firearm advances or promotes the drug crime. United States v. Grace, 367 F.3d 29, 34-35 (1st Cir.2004); United States v. Garner, 338 F.3d 78, 81 (1st Cir.2003). For example, we have held that possession of a firearm to protect drugs or sales proceeds can establish such a nexus. United States v. Robinson, 473 F.3d 387, 399 (1st Cir.2007); Delgado-Hernandez, 420 F.3d at 31-32; Garner, 338 F.3d at 81.
We have also analyzed "in furtherance of" evidence from both subjective and objective standpoints. Felton, 417 F.3d at 104-5.[4] In applying an objective analysis, we have often considered the proximity of the firearm to the contraband. In Grace, for example, we found evidence sufficient where an unloaded firearm was found in the same residence as drugs and sales proceeds. 367 F.3d at 34-35. And in United States v. Luciano, 329 F.3d 1 (1st Cir.2003), we affirmed a conviction where the firearms were located in a crawl space also containing heroin and drug paraphernalia.
Marin argues that the objective evidence "consisted only" of the presence of *28 the handgun a few feet from an amount of drugs far smaller than what was found in the basement. This, he claims, in combination with the fact that there was no evidence of him carrying the gun while actually engaging in the drug deals, proves no more than "mere presence" of the firearm, insufficient to support a conviction. But there was much more to the evidence, which, taken in sum, supports a different conclusion. As noted, DEA agents discovered a loaded gun in Marin's bedroom where it would be easily accessible to him if surprised in the night. The weapon was found, with a loaded spare clip, under Marin's mattress, in the same room as  and only a few feet from  75 grams of cocaine and a digital scale, and in the same house as an additional 700 grams of cocaine and proceeds from drug sales.[5] We have little doubt that a jury could have reasonably inferred from this evidence that Marin possessed the firearm to protect his drug trafficking activities. Moreover, the jury also heard testimony that drug traffickers often possess firearms for protection of their trafficking activities. And, as we have noted, "The cases dealing with weapons used in drug dealings regularly uphold `in furtherance' findings based on a weapon's capacity to counter resistance. Actual use may be more common in drug deals, but there is no requirement that actual use be proved." Felton, 417 F.3d at 105 (footnote omitted).
Our conclusion is no different with respect to the evidence of Marin's subjective intent to possess the firearm "in furtherance of" his drug trafficking. Where direct evidence of subjective intent is lacking, the jury is free to infer intent from objective circumstances. Id. Here, in addition to the objective facts as noted above  the proximity of the gun to the cocaine, cash and paraphernalia, as well as it being easily accessed by Marin when he was otherwise vulnerable  the facts that the gun had an obliterated serial number and that Marin admitted that he purchased the gun from another cocaine dealer also support an inference that he subjectively intended to possess the weapon in furtherance of the underlying drug crime. Accordingly, the district court did not err in denying Marin's motion for judgment of acquittal.

2. Evidentiary Issues

a. Agent Barron's Testimony
Appellant next argues that the district court improperly allowed DEA Agent John Barron to testify that, during an interview of Marin, he did not ask Marin why he had the gun because "it was obvious." Marin claims this was improper expert testimony in violation of Fed.R.Evid. 702. We disagree.
The testimony came during re-direct examination. On cross-examination by defense counsel, Barron had testified that Marin never admitted to him that the gun recovered in his bedroom was related to drug dealing. He also described Marin as forthright during two conversations with him. The testimony was as follows:
Q: [H]e never admitted that the gun you found had anything to do with the drugs that he was selling, is that correct?
A: That's correct.
. . .
Q: And your interview of him involved questioning him about the gun both at the Springfield Police Station then on a *29 separate day here at the courthouse before his arraignment, correct?
A: Yes.
Q: And during both of those times he did not tell you that the gun had anything to do with the drugs that he was selling, correct?
A: Yes.
The following exchange ensued on redirect examination:
Q: Agent Barron, in your two interviews with the defendant, did you ask him why he possessed the Lorcin firearm and ammunition?
A: No, we did not.
Q: Why not, Sir?
A: It was obvious to us for the same reason that we didn't 
Defense Counsel: Objection, Your Honor, move to strike.
Court: I'm going to overrule the objection. This is the witness's [sic] reason and I think it's fair to get into that.
Q: Please continue, Sir.
A: For the same reason, we didn't ask him why he possessed seven one-hundred gram packages of cocaine or the smaller packages that were in his night stand. We felt we knew why he possessed the firearm.
The first bone of appellate contention is the government's argument that Marin did not preserve an objection based on improperly admitted expert testimony because of the general nature of the objection lodged at trial, as noted above. As such, the government argues, our review is only for plain error, as opposed to the more generous (to the appellant) abuse of discretion standard. We need not resolve this preliminary issue, however, as we find the admission of Agent Barron's testimony to be proper regardless of the standard of review.
We reject Marin's claim that Barron's statement constituted expert testimony, subject to Rule 702. Instead, we view the re-direct testimony at issue as an acceptable response to the defense "opening the door," where the trial court allowed the government to "clarif[y] an issue which the defense opened up on cross-examination." United States v. Catano, 65 F.3d 219, 226 (1st Cir.1995). Catano was a drug case in which the defense used cross-examination to undermine a cooperating prosecution witness' credibility by suggesting that he barely knew the defendant. Id. at 225. On re-direct examination, over defense objections, the government elicited testimony that the witness knew the defendant from prior drug transactions. The district court allowed the testimony, ruling that the cross-examination had opened the door by suggesting (inaccurately) that a meeting between the witness and the defendant had been an isolated event. Id. We affirmed, finding no abuse of discretion in allowing the government to explore the past dealings of the witness and the defendant. Id. at 226. The same rationale applies here, where the government sought to clarify the context of Marin's statements  or more precisely, the absence of a specific statement to Barron by pointing out that Barron never asked Marin why he owned the weapon in question, and why he didn't ask. As we noted in Catano, failure to allow such limited redirect testimony could allow "litigants to create misleading impressions, secure in the knowledge that the other side was barred from disabusing the jury." Id. at 226. Here, Marin's cross-examination of Barron, standing alone, could have left the impression that Marin had denied drug-related firearm ownership, without the defense offering any supporting evidence. The re-direct examination of Barron yielded an appropriate response. His testimony that "it was obvious" to him that the gun *30 was related to the drug business put his actions  and Marin's statements  in their appropriate contexts.

b. "Other act" / Character evidence
The appellant next argues that the trial court impermissibly admitted evidence: that he possessed a club at the time of his arrest; and that mementos from the movie "Scarface"  a film in which drugs and violence are both prominent  were found in his home. Marin argues that these were admitted to prove a propensity for violence, in violation of Fed.R.Evid. 404(b). We will address each contention in turn. In light of appellant's trial objection, we review the admission of the "billy club" testimony for abuse of discretion. United States v. Flemmi, 402 F.3d 79, 86 (1st Cir.2005).
Agent Barron testified on direct examination that when agents' unmarked vehicles prevented Marin from driving away from his home, Marin exited his vehicle holding a billy club. The trial judge overruled the defense objection, accepting the government's argument that the testimony about the club was relevant to the steps that Marin would take to protect his drug dealing business, since he had 100 grams of cocaine with him at the time of his arrest. In our view, the trial court did not abuse its discretion.
As an initial matter, we agree with the government that Marin's brandishing the billy club was not inadmissible Rule 404(b) "bad act" evidence. Instead, it was a part of the drug trafficking offenses for which he was charged (and later pled guilty), from which the jury could infer that Marin would arm himself to protect his business. See United States v. Pierre, 484 F.3d 75, 84-5 (evidence of prior bad act was probative of charged crime itself, thus defeating 404(b) claim); United States v. Rodriguez-Estrada, 877 F.2d 153, 156 (1st Cir.1989) (when subject incident occurs close in time and is highly relevant to the charged conduct, "the argument for admissibility is powerful"). The jury was entitled to infer from Marin's club-wielding that he knew drug dealing could be dangerous, and he thus had a motive to arm himself. Both knowledge and motive are exceptions to inadmissibility under Rule 404(b). We also reject appellant's passing assertion that the evidence was unfairly prejudicial. While Rule 403 allows exclusion of relevant evidence "if its probative value is substantially outweighed by the danger of unfair prejudice," we find no such unfair prejudice here.
The final point related to the club is the government's reference to it in closing argument. The prosecutor said, "... and when they arrested him you get your first real glimpse of the defendant's character, how he acted when he felt threatened... or he felt his drug supply was threatened...." While, as the government acknowledges, the use of the evidentiary term-of-art "character" in such circumstances was ill-advised, we are satisfied that, in context, it is not grounds for reversal. Marin's defense was that his gun possession had nothing to do with his drug business. The government was entitled to argue that weapons were part of his business.
We need not dwell long on the "Scarface" evidence.[6] First, it was the appellant who first referenced it in his opening statement, in support of the defense *31 theory that Marin was simply "interested in guns." Next, the evidence was introduced by the government without objection, except to prevent the government's use of it to show a propensity to emulate the movie character. Accordingly, the district judge allowed the government to use the evidence solely to rebut the "casual interest" argument because of the reference made by the defense. We agree with the defendant to the extent that, in some circumstances, the government's reliance on the "Scarface" evidence might be improper. Here, however, there was some probative value to the evidence, that of rebutting a defense theory which had been previewed to the jury in the opening statement, that relied on similar evidence.[7] We find no plain error.
We have reviewed the appellant's remaining evidentiary arguments and find them without merit.
Affirmed.
NOTES
[1]  Prior to trial, Marin pled guilty to five drug-related charges contained in the same seven-count indictment as this charge. After trial, on grounds not relevant to this appeal, the district court granted Marin's motion for judgment of acquittal on a charge of possession of a firearm and ammunition by a convicted felon. Marin was sentenced to five concurrent 60-month terms on the drug counts, and to an additional 60 months on the firearm conviction to be served consecutively.
[2]  Marin's trial defense was effectuated through cross-examination of government witnesses, as he neither testified nor called witnesses on his behalf.
[3]  To be precise, Marin claims the district court erred in denying his post-trial motion for judgment of acquittal. For our purposes, there is no analytical distinction. United States v. Hernandez, 218 F.3d 58, 64 (1st Cir.2000).
[4]  In Felton, we reversed the district court's judgment of acquittal of defendants who had been convicted by a jury of violating section 924(c). Although the predicate offense in Felton was bomb-making, not drugs, there is no principled reason for a different analysis.
[5]  The record reflects that Marin forfeited the $1500 as drug proceeds in connection with his plea agreement.
[6]  The evidence consists of a "shadowbox" containing a picture of actor Al Pacino portraying a violent drug dealer, with a replica gun, cigar and money under the photo; and a poster of Pacino aiming a machine gun.
[7]  Marin briefly alludes to the "Scarface" evidence being unfairly prejudicial. In view of the evidence's legitimate use and in light of the other evidence in the case, we cannot say that the danger of unfair prejudice substantially outweighed the probative value of the evidence. See Fed.R.Evid. 403.
