Team Canada star shaken up after nasty hit from behind.

Supporters of team Canada, as well as Ottawa Senators fans everywhere nearly had a heart attack today, as one of their stars seemed to suffer a serious injury.

Canada's Mark Stone was forced to leave Saturday's semifinal game versus the United States at the World Championship after being shoved into the boards from behind by U.S defender Connor Murphy.

Stone dropped immediately to his knees, clutching at his shoulder, and a scrum between the two teams ensued. He headed straight to the Canadian dressing room, but luckily he was able to return for the third frame.

The Ottawa Senators forward had four goals and 10 points through eight games entering Saturday.

Here is the hit:

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