Three videos of questionable sanity

1) For all you slackers out there, a sport called Slacklining

2) For those of you who were fans of the the Fifth Gear's review of the Carver, I give you the T-Rex

3) And finally, for anyone who has ever done skateboarding, snowboarding, surfing, or any similar sport, a not so new toy that looks like fun even to me: The 'motorcycle for your feet'. You can really get the idea from the first few seconds of the vid and don't need to watch the whole five and a half minutes, although you should at least skip ahead to the part where they're not just riding on the beach (around 2:10 and 2:55). Also note the gratuitous bikini at about 2:30. I say gratuitous because the camera stops focusing on the machine being demoed.