http://www.filecabi.net/v/file/police-brutality/wmv
well, makes me think about the damage code for riot shields. sheesh.

http://www.filecabi.net/v/file/parkour-movie/wmv
those crazy parkour folks. can you imagine physads doing their stuff?

http://www.filecabi.net/host/file/50caliber/wmv
various objects being shot at by a 50 caliber.

You can view the full version of the last video here (RealMedia). It's from a USMC terminal effects demonstration of an M82A1A.

The second one reminds me of a new sport in england. I forget the name of it but basically they just do what was in the video (without the fighting) jumping from roof top to roof top.