My first thought was that it should have been a double minor. Then, someone pointed out that boarding cannot be a double minor. I looked up the rule.

41.1 Boarding – A boarding penalty shall be imposed on any player or goalkeeper who checks or pushes a defenseless opponent in such a manner that causes the opponent to hit or impact the boards violently in the boards. The severity of the penalty, based upon the impact with the boards, shall be at the discretion of the Referee.

There is an enormous amount of judgment involved in the application of this rule by the Referees. The onus is on the player applying the check to ensure his opponent is not in a defenseless position and if so, he must avoid or minimize the contact. However, in determining wheter such contact could have been avoided, the circumstances of the check, including whether the opponent put himself in a vulnerable position immediately prior to or simultaneously with the check or whether the check was unavoidable can be considered. This balance must be considered by the Referees when applying this rule.

Any unnecessary contact with a player playing the puck on an obvious “icing” or “off-side” play which results in that player hitting or impacting the boards is “boarding” and must be penalized as such. In other instances where there is no contact with the boards, it should be treated as “charging.”

41.2 Minor Penalty – The Referee, at his discretion, may assess a minor penalty, based on the degree of violence of the impact with the boards, to a player guilty of boarding an opponent.

41.3 Major Penalty – The Referee, at his discretion, may assess a major penalty, based on the degree of violence of the impact with the boards, to a player guilty of boarding an opponent (see41.5).

41.4 Match Penalty – The Referee, at his discretion, may assess a match penalty if, in his judgment, the player attempted to or deliberately injured his opponent by boarding.

The hit wasn’t violent enough for a major penalty, the little bit of blood aside. Dwight King’s push was minimal. It was a dangerous play but two minutes was the right call, with a bonus shorthanded goal to boot.

Here is the video.