This was a big moment in the game as well. It was midway through the third period and Dallas was ahead 1-0. The Rangers did not score on the power play, but this call could have altered the game if they did.
In the referee's defense, the rules do state that any goalie who removes his helmet during play will be assessed a penalty. I have a feeling this play will be looked at again and discussed in the league. Certainly no one wants to see a goalie play in today's game with a damaged or broken mask. On the flip, side the Rangers were in the zone trying to create some moment and generate some offense. It's a fine line, certainly the league wants to protect it goaltenders but we also don't want a stoppage anytime a goalie takes a shot off his mask.