Check it out...
This is the first one, the second one(with not quite so big a lip) is now currently in production.

Who do you think will be the first to do a backflip on a quad?

http://www.yochams.com/freestyleramp.htm

 

make sure you video tape anyone stupid enough to try it. There's a lot of people in the race for the backflip, and that ramp looks like it could have some potential. Have em do it into ponds first to see distance/height/angle first. Nice job on the ramp.