How do you react as a player or a fan when a team blows a 4-1 lead in the third period of a playoff Game 7?

Well, you get sad. And mad. And everything in between.

And what if the final two goals to tie the score in regulation came in the final 2 minutes ... and what if this all happened to Toronto, perhaps the most hockey-proud city in the world?

Extra sad. Extra mad.

Toronto Maple Leafs forward Joffrey Lupul won't soon forget Monday night's game against the Boston Bruins.

A day after his team's stunning Game 7 collapse, Lupul took to Twitter to vent his frustration.

"That hockey game will haunt me until the day I die," he tweeted Tuesday afternoon.

Also:

The unshaven faces of sadness and disappointment walked through and around the Maple Leafs dressing room, their expressions of shock saying more than their words could muster.

It was that difficult. It was that challenging. It was, in so many ways, that sad for the Maple Leafs.

It was only the first round, and yet still we imagine this is comparable to what Vikings fans have felt in gut-punch NFC title games. If you see someone in a Leafs jersey, go easy. Maybe offer a hug.