i hope you asked the guy if you could jump it. i have rode on this guy's little track before, but it was more for dirt bikes with some STEEP little doubles, whoops/rhythm sections (could be rode as doubles), and some berms. it was a nice little track, but i didnt really have the balls to ride it hard back then. i wouldnt have jumped the doubles though. the werent too far apart and the landing was just about as steep as the takeoff! anyway, he didnt mind anyone riding on it as long as they didnt tear anything up from what my buddy told me. apparently he knew the guy or knew a guy that did or something like that, so it was cool. now i can wait to get mine done. thinking about making it about 20ft long. the takeoff is good right now and seems to throw you just right. need to get to work on it!