Practice on trampoline first, they are easy and once you are off axis it natural uprights you. Basically, at 180 your head should be look back and down slightly, and you'll feel your legs kick up. Keep tucked up in that position, and keep looking for the tramp/landing. Once you see it open up and land.
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'thats where the sniper will sit and pick off the fat kids ruining the good jumps' Local_608