With just a few minutes left in Game 6 of the 1989 Wales Conference Finals series against the Montreal Canadiens, and Philadelphia on the verge of seeing their season end, former Flyers goaltender and current Flyers general manager Ron Hextall charged from his crease and attacked Habs defenseman Chris Chelios.
Hextall was later suspended 12 games for the attack, which he said was retaliation for a Chelios elbow to the head of Brian Propp in Game 1 of the same series. Propp had been knocked out and he missed Game 2 with the injury. (It's worth noting that today, he probably would have missed much more time, knowing what we do about concussions.