A sex act where the receiver is elderly and requires a Zimmer frame for mobility. Before
penetration, attach some strings to some chocks, wedge a chock under each frame wheel for stability, hold the strings loosely in each hand, then proceed to bend the receiver over the frame and go to town.
At point of
ejaculation, shout "Chocks Away!" and with one last powerful thrust, pull the chocks away by the strings, knocking the receiver over the Zimmer frame and onto the floor. The
ejaculate will be spaffing all over the now floored (and fully satisfied) receiver.