Great twin youtube videos

I think we're not too far away from experiencing our own version of this: http://www.youtube.com/watch?v=GQxaEw9yjdI

Some others I thought were funny:

http://www.youtube.com/watch?v=MNxIrAnJLlM

http://www.youtube.com/watch?v=PWWkotM_Z6w

http://www.youtube.com/watch?v=8JFiQ6WNTAE&feature=endscreen&NR=1

And most terrifying: http://www.youtube.com/watch?v=8FyEqrMf1io