I was just wondering if there's any way to make a working loop for a racetrack? I saw one on T.V. at a skatepark and thought that would be really cool addition to a track.
Nope, its pretty much impossible unless you hook it up with some man cannons and some walls blocking you from falling off. If you're using a mongoose, that is. My suggestion is, don't do it. Even if you do make it work, the landing will be rough and disorganized, and make your track a lot less smooth.
He said he just wanted a working loop, never said he didn't want grav lifts or man cannons. Small rails on the edges can be used to block racers from falling off and it won't be an eyesore.