Haha that was hilarious: To the posters above: I dont think it is fake. The guy wears his pants baggy. I humiliated someone similar to this myself it is extremely easy when the pants are below the waist.
Also this happened in a german U Bahn. The guy with the newspaper saw trouble coming, this happens often in the Berlin U Bahn this is why he reacted so fast and why the other guy got the camera out(handy cam maybe)
Very natural behaviour and comments from all the guys there, very likely no fake but hilarious.

that dude is my hero of the week. kick ass

LMAO!!! Oh that was the best thing I've seen all day! hahaha!

That was fucking great.

cool

Hilarious!

one thing the hero forgot was TAKE HER NUMBERRRRRR !!!