When two hoodlums start to banter and may cause serious causality.
Nigga 1: Hello thy fello it seems that you have bumped into me
Nigga 2: Blasphemy, draw thy flintlock!
Nigga 1: Oh dear, it seems that us common hoodlums have engaged in a nigga moment
When two white males accidentally bump into each other on the crosswalk, they would simply shake it off or say "Sorry/Excuse me"
When two black males 'accidentally' bump into each other on the crosswalk, they would start a fight right then and there for the littlest reason. Heck, one might even pull out a gun or knife. ...Maybe both.