It didn't take that long did it? Here's my first piece of internet research. Maybe I could make this blog one of my Sketchbooks? Ummmmmm.
I find this clip short film very interesting. It seems more like an experiment but it definitely has a sense of 'virtual self harm' where someone is harming themselves without anthing really happening.
The 2nd and 3rd scenes seem to be using blue or green paint and using the Keyed in 'green screen' effect but the 1st scene is very intriguing and is hard to see how it's done. There's obviously some overlaying effects but I'm not sure whether that's been done afterwards or using a projector. Still, very cool!