He left his feet hitting Couturier. That, if I'm not mistaken, is usually an automatic suspension.
I still think that play was accidental. And I've been pretty hard on the Pens today. Just seemed like he change directions on the turnover and ended up running straight into him. I know the jumping looks bad, but players do that when trying to get around people - look at his goal earlier for an example.
Probably need a replay, but that was my impression at the time. Hit on Giroux looked way more intentional.