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Back in the early days of flying, guys would wear leather hats, scarves, and squinty goggles, then pull down their pants and underwear, grab an invisible propeller, and bounce around like a lunatic, making their soft wieners spin like crazy. Ladies could do the same with their jiggling boobies as the propeller.
My uncle did this at the family reunion and got called a 'flying meatloaf.'
My cousin tried it at school and got sent to the principal's office.
My neighbor did it on the street and got chased by a cop.