Again,

as in the nightclub, he'll
be stalking, looking for eye contact. If you are in Code
Yellow, you can spot these signs from a mile off.
There are two main kinds of eye contact that may escalate
into violence:
1) The cursory glance
Someone accidentally catches your eye, or you his. The
glance becoming a stare, and progresses to a verbal
exchange. This is the Pre-cursor to violence. Often, when
you make eye contact with someone and it becomes
increasingly obvious that you do not know each other, the
ego clicks in and goes to work. The initial accidental eye
contact becomes a fullyfledged staring contest. The eyes,
being a sensitive organ, cannot hold a stare for too long
without the occurrence of soreness, watering or blinking.
Not wanting to blink first, because it might be construed as
a 'backing down', the one with the sorest eyes throws a
verbal challenge, ('You fucking looking at me?) to hide the
fact that he needs to blink. If the verbal Challenge is
returned ('Yeah, I am looking at you! What you gonna do
about it?'), then the fight is probably on.