those first two vids are nuts!
the other ones are loltastic.
Also, I was looking at some more related vids and some of these rollers sound absolutely horrible. I hope the people in the video just set them up incorrectly cause otherwise, goddamn. My neighbors and roommates will hate me.
Still, it looks like they're a lot more fun than trainers, albeit more difficult to ride comfortably. Then again, that's part of the fun and the workout I suppose.