Press p to pause. When it's not paused you can drag the little guy's limbs around by the points. Mouse over any point and press space on your keyboard to change it to static/dynamic. This is also possible when paused.
Yeah, I found this in some of my old files where it was originally just a ragdoll attached to the wall by his hands, so I thought it'd be cool to redo it and add some other features.
its so fun to play around with