It's from a video called "Bumfights". It was very controversial but the guys who made it managed to avoid getting sued (from what I understand).

They did various things to/with homeless people and would film them. The antics ranged from pitting them against each other to pulling out their teeth with pliers to handcuffing them to a pole and placing crack (no pun intended) millimetres out of reach.

They have a website where you can purchase a video or you could always download it (though would never encourage that).

A friend of mine showed it to me and it is messed up!

Eek.

If I was in the middle of dinner and someone ran in doing that, I'd have to laugh...that's too funny.