A sex position done inside of a plane, or some vehicle which attains a high altitude (10,000+ feet). After the male ejaculates, he tosses his partner outside of the vehicle, letting them drop down.

A fun game to do with this is to ejaculate outside of the window, and try to figure out which hit the ground first.
The airplane school had a sign saying "No Tampa Skydiving without a parachute".
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