name of english movie in which at d climax a man who is apparently shot by an old man bluffs lady and others?

he changes a briefcase in a trailer and works with old man to steal a
briefcase full of cash. he is shot while sitting in car by old man
which turns out to be a bluff. both lady and a gang of gangsters are
convinced that he is dead. he ultimately takes the cash and hires a
bus to leave. this movie was in hbo some years back.