Little Man (2006)

After spending a few years in jail, Calvin Sims, a small but tough thief, decides to leave the world of crime. However, he wants to make one final big heist before retiring. Together with his partner, they prepare to steal a valuable diamond with a perfect plan. Unfortunately, something goes wrong, and they are forced to stash the gem in a stranger's purse. It's a hilarious and gleefully off-the-rails story, you will laugh a lot.