Name of this American movie

Stories of 3 or 4 completely different people Who don’t know each other..I remember just one of them – black man who is living very boring dull unsatisfying life as some office worker, one day something changes and he does a bank robbery. When he is chased by police to the rooftop he finally feels alive, happy and his part finishes when he laught at the rooftop (and maybe being shot by police – I’m not sure). I can’t find this movie for many years, Any ideas? 😊