Testosterone and pride are occasionally an ugly mixture.
Young men are easily controlled by these two factors.
Its not an accident that male teens, to late 20's, are the most likely to die violently.
Personally, I can get my wife so mad she will hit and kick at me very hard. I tease her into it.
I cover up, run, make her chase me around furniture. But hit her back... Never entered my brain.
The guy on the bus did the same thing to a crazy woman he does not even know. "I will get my grand daughter or whatever to punch you out, you need to get cut or slit". It's almost like he wanted to tease her into an attack.
"Sit down ma'am please... Please, I am driving people on a bus, this is dangerous". He went low like the crazy girl.
Think he would haVe prompted challenges from an ex NFL player with nothing to lose?
Pride at having a wench yell at him took over. I think a lot of these incidents would pass by if it were not for onlookers that might be perceived as making one party look soft. The girl was also acting out in front of friends it appeared. I hope both learned a lesson.