All you need is a hallway, a rolling
chair, and a willing girlfriend.
The girl sits down naked in a rolling
chair at the end of a hallway, and the man climbs on top of her, upside down, and they begin to perform the "69" on each other. When he is about to cum, he slides down her body and sticks it in her front for 3 good thrusts counting down (3... 2... 1...) then as he cums on the third thrust, he simultaneously slides all the way off, kicks the
chair hard, and shouts "Lift Off!" as she goes rolling down the hall with the his cum leaving her like flames out the
bottom of a space ship.