After the winning goal was scored, the scoreboard reads 5-4. As the players rush onto the ice to celebrate, the scoreboard still reads 4-4.
The hockey rink where the play-off game is being held is missing the four face-off circles (should be two on each end of the rink, one on either side of each goal). It is also missing the center line.
Kirby forgets to fasten his helmet's chin-strap before he heads out on the ice for his "comeback" practice game.