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Boobs flying challenge - The challenge is to bounce your boobs hard enough that they fly straight up in the air. The bigger the boobs, the higher they can fly! It's completely up to you to determine your own bouncing method (very high trampoline jumps, very high jumping from the floor, high and rapid jumping jacks)or my favorite, running in place at a sprinting speed while bringing the knees very high (I've seen a couple of girls bounce them over their head using this method). Whichever method is used it's to be done topless and with your arms up and hands behind your head.