A jump in the tracks??? Totally impossible unless it's simulated for the sheer fact that the wheels on coasters go on 4 sides of the track (both left & right side, top & underneath) so to land back on the track, it'd have to be 1 in a billion shot!
I can see maybe a Go-Kart track that does that [jump the track] (though I could also see a lotta lawsuits for those that don't clear it!)
