Here's a video of an insane Wisconsin fan ... JUMPING OFF A STREETLIGHT ... in the middle of a "We Just Lost the NCAA Championship" party in Madison Monday night.
You can see the crowd of people below sort of break the guy's fall -- and a bunch of people in bright vests (probably cops) rush in to handle the situation.
We spoke with a rep for the Madison PD who tells us the jumping was really an isolated moment of stupidity -- and for the most part, the students and fans were pretty peaceful.
As for the post-game party stats in Madison -- 5 arrests (but of those only 2 people were booked).
No property damage or injuries were reported ... so, we're guessing jumper guy is ok.
One MPD officer told us, "Our arrest numbers were very minimal. It was more of an alcohol and testosterone fueled mosh pit."