That's what Detroit head coach Derek Lalonde wanted to know before he was ejected from the Red Wings' game against the Penguins. We break down the initial play, the Coach's Challenge for goaltender interference, the rule, the announcement, and the fallout from the play.  Also the net goes off but the puck goes in on Marchenko's goal, shootout specifics, Habs' Hoffman weighs in after Lizotte gets suspended for cross-checking, McDavid's McBoarding, retired referee Brad Meier's debut as the NHL's latest TV rules analyst, and the return of the ref-cam - and how the NHL can use it to help grow the game. 

More on these plays, including video clips and rule breakdowns, at scoutingtherefs.com

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