You shouldn't make people angry.
Tom, a racist man, is driving with some friends when he sees a car with some ethnic minorities in it.
Tom wants the ethnic minorities to stay away from him.
Tom intentionally slows down to let the other car speed ahead of him.
Tom rolls down his window and tells the people not to come near his car or else he'll get out and fight them.
Tom avoids all trouble with the car full of people that he dislikes.
The people get angry, take Tom up on his offer, get out of their car, and surround Tom's car menacingly.