Some ignorant 20 year old dude trying to impress his posse & or girlfriend by keep starin' at you untill you look away.
Which u don't.
Usually followed up by a 'Hey' or 'What are you starin' at!?'..
I guess the phrase "Any reaction is a good reaction"..
Applies in this picture looking at the fact, that w/e you do..
He'll never take any action, of any kind..