The ending: Overkill?!
I mean common, the guy just committed Seppuku and they still blast him to bits? That was a strange combination of overkill and mercy killing really.
I thought throughout the movie that the guy in the wheelchair did it. Why else would he tell him to "let it go"? I thought it was obvious that the guy in the wheelchair either wanted to remove his Russian competition and planted the Tokarev gun he had stashed, or that he wanted to get into business with the Russians but they wanted revenge for something Nicolas Cage's character did.