This scary incident happened during the Maple Leafs' 4-3 shootout loss to Colorado:

Per the Globe and Mail's James Mirtle:

"Daniel Winnik is alert and moving,” the Leafs posted to their official Twitter account later in the first period. “He is currently being evaluated by the Leafs team doctor.”

After the game, Leafs coach Randy Carlyle provided an update that Winnik was “100 per cent,” making a full recovery despite the ominous way he left the game.

The fact he was walking around in the dressing room during the first intermission was said to have helped inspire his teammates to battle back in the game.