A person was stabbed last night during a fight that took place inside the TD Garden at the end of a Celtics game last night and it was all caught on video.

It looks like it started with two losers, both wearing Rondo jerseys (go figure) yelling at each other. You can see one of them throw something, and without hesitation you see the other guy whip out a knife, and make a motion like it's a switchblade.

The weapon was a box cutter, according to police.

Maybe I can see a fight breaking out because the Celtics are getting blown out, or they're winning by a lot but this makes no sense. The game was a GREAT game that went down to the wire.

The Grizzlies had the last possession with a chance to tie the game and these idiots are causing a riot in the nosebleeds!

The Boston Police say the 20-year old victim was taken to Mass General with non-life-threatening injuries.

Sidenote: Don't look now bu the Celtics are only one game back of the 8th seed!