The very first coach’s challenge occurred when the Toronto Maple Leafs hosted the Montreal Canadiens. Jeff Petry fired the puck into the net, but Toronto goalie Jonathan Bernier appeared to be bumped by a Canadiens stick.
The play was reviewed and the goal was overturned.
The review went fairly quickly (the call was an obvious one), but it’s interesting to see how the coach’s challenge works in an actual game.
(H/T Reddit Hockey)