 Most OTB on jumps come from a combination of two things. 0. Lack of jumping technique (for the particular jump). If you can't do a proper bunny hop/j-hop or at least a good wheel lift you shouldn't be launching yourself off of jumps. Most beginners ride off a jump and allow the jump to set their rotational momentum in the air. This sometimes works for long wedge type jumps but fails miserably with steep dirt jump type jumps. If the jump sets your angular momentum too far forward or back you're gonna eat shit. You should be preloading as you approach the jump, slightly bending your elbows and knees to get your chest and hips closer to the bike then when you are leaving the lip you will actually be "popping" to set your angular momentum to essentially 0. If you watch a talented rider hit a jump they will perform a j-hop/bunny hop as they leave the lip. They will be pulling up on the bars while extending their legs. This allows them to set a fairly level flight path despite the varying shapes of the jumps. 0. poor suspension setup. Too much rebound in the rear or two little in the front can unbalance you in the air. The proper settings will depend on the speed and shape of the jump as well as the bike. If you've been jumping your bike long enough to have good technique you've probably figured out how you like your suspension set up. I've been trying to teach my girlfriend to jump and bunny hop so all the things I used to just do I've been trying to put into words. It's not easy since endless hours on the bike are the true key. There are some YouTube videos that I've found helpful. Follow Phil's progression of videos from bunny hop to jumping. 