Once again, I must reiterate:
You don't **** with old men...especially old men who survived 'Nam.
Old people are crazy.
I couldn't hear the video well, what started the fight? All I heard was the race card being played, that the old guy is 67, and then "I'll slap the shit out of you". And then he did slap the shit out of him.
Bus fights here don't happen much, but the one time it did happen someone killed someone else.