What happens when our hero from the classic Contra video game finds himself trapped inside a Tetris game? Be sure to watch for the surprise ending :) - via Everlasting Blort
If you like this sort of stuff, then NeatoGeek is the Neatoblog for you!
More "versus" animations? Visit Tvigle.ru [in Russian, but you don't need to know the language to appreciate the clips]
:-D
There is one video where he shows how he puts it all together.