The NEC men's hoops championship game on Tuesday night turned ugly ... after a shirtless fan escalated a huge skirmish in the stands by throwing his drink on another man.
The wild scene all went down with just minutes left in the Bryant vs. Wagner tilt in Rhode Island ... when Bryant fans appeared to get into it with Wagner supporters.
Broadcast cameras captured the scuffle in the seats ... and you can see, punches were thrown -- before a fan with no top on chucked the remnants of his drink at another man.