Cal Clutterbuck check on Torey Krug (video)

This is the hit that New York Islanders forward Cal Clutterbuck put on Boston Bruins defenseman Torey Krug. If you watch the video, Krug never had possession of the puck at anytime. The hit stunned Krug, but he was able to return to the game.

Should this have been an interference penalty? What do you think?