The NHL is cracking down on goaltenders for delaying the game, but more so purposely shaking their helmets off of their head to get a whistle during their opposing teams scoring opportunity.
Goaltender shake their helmets off in hopes for a stoppage in play due to the on-pour of offence being applied by their opponents, and it's been seen a few times this season.
Last night, Dallas Stars goaltender Jake Oettinger was given a 2-minute delay of game penalty for taking his helmet off, which resulted in a stoppage of play. A questionable penalty for this scenario due to it's not clear how it happened, but clearly the referees thought it was unnecessary.