i thought it was a bizarre reaction to a missed trapezoid call.
"you touched that puck right there! i'm gonna go do something violent and reckless as revenge!!!!"
i mean, it's not like he was retaliating to a high stick or a punch to the head. bizarre.
...giroux made a dirty, dirty play. but i wouldn't call him a dirty player. doesn't really matter in this case though. he should be suspended a game.