Check out this video. You have to click on video's on the main page. Check out teaser III. These guys are nuts. The name of the site is sledporn.com There's a few more video's on the site.
http://www.sledporn.com/media/videos/SPIII%20Web%20Teaser%20Final.wmv
http://www.sledporn.com/media/videos/SPIII%20Web%20Teaser%20Final.wmv