I have, and it was the most physically draining thing I've ever done. I'm also a weak SOB thats out of shape. Watching it again, I had about as much oomph after 2 minutes as they did after 6. Still though, they don't exactly look like the pinacle of phyisical fitness. If I was going to do some sort of underground barehanded fighting, I sure as hell wouldn't be dragging around an extra 40 pounds like that white dude.

They do need better video equipment, or atleast a better encoding algorithm. You can barely tell if they're even landing some of those punches!