Skier was a douchebag... I'll let the rest of you rail the guy.
but I don't really think I can condone that one guy taking off his shirt and then following the guy (plus the push... not sure what that was about). I realize that the guy deserved it, but it's better if you're just the bigger man and all.
(Please note: No problem unstrapping from the board. I would've done that too in case the guy decided to try something)