The rules vary slightly but are generally simple: Each team gathers around its net, someone takes a shot from high in the zone, and the other players then try to score on the rebound, using deflections, backdoor feeds, passes off pads, sharp-angle shots and bar-down snipes from close range until the puck finally goes in and everyone skates away triumphantly, signifying the end of the warmup.
If the goalie somehow keeps the puck out until the horn sounds to end warmup (the length of the Last Puck game varies from team to team), he wins the game.
Tending to this mad scramble is almost always the task of the backup goalie that night, but not when Marc-Andre Fleury is getting ready to start a game.
"I always did it," the Vegas Golden Knights No. 1 goalie said. "I like to move fast, try to get a sweat in warmups and it is fun trying to battle and you know the guys really want to score, so have fun with it."
Fleury is smiling as he says this, just as he does throughout most games of Last Puck, mixing his ever-present grin with the explosive saves that have become equal parts of his trademark.
For Fleury, who turned 34 on Nov. 28, having fun remains an important part of a 15-year NHL career that already includes 419 wins, good for 10th place on the all-time list.
"It matters to me," Fleury said, "And I think it's been good for our team too, right? It's always more fun when you have success, obviously. Everything is easier when everyone is smiling, but I feel like when you smile, you relax, you play hard."
That's why Fleury still plays Last Puck. And it's why he was spotted doing a cartwheel in full equipment outside the dressing room before a start with the Pittsburgh Penguins during the 2017 Stanley Cup Playoffs.
"I think it helps," he said. "I wasn't starting and Matt [Murray] got hurt and I was going in and I was a little nervous. I hadn't played in a while so I was stretching and throwing balls on the wall and I thought like, 'To heck with this, just relax, and go have fun.' "