It appears that some dumb fan took Jericho's stuff a little too seriously, stopping Jericho's rental car, slamming his door shut and verbally assualting him. Then the fan's girlfriend spit on him and shoved him as he was getting back in the car leading to Jericho to defend himself.
I give Jericho credit for defending himself and find the two fans that did this complete and utter *******s. They got what they deserve, don't touch the talent that puts on a show for you, this is a wrestling persona not a personality.