During the third period of Tuesday's meeting between the Canadiens and the visiting Minnesota Wild, Gallagher came sliding into goaltender
Marc-Andre Fleury after having the puck stripped away while trying to drive the net. Gallagher was never really posing a risk of running into Fleury, but nevertheless, Fleury extended his blocker hand down to act like he was trying to stop Gallagher from making content. In the exchange, he used his blocker to pull Gallagher's helmet off, rendering him an ineligible skater, forcing him to leave the ice or be penalized.