^ Here is an example of how to do stop motion with action scenes. It's done with a Playstation Eye, Gundam action figures, clear stands, flashlights, light diffuser, and laser pointers. This is his latest video, it's good, but I was too lazy to find a slightly better example from him:
http://www.youtube.com/watch?v=HQhd9TCfk4Q
And there are tutorials on his channel on how to do this, if your interested.