planetpatent.com

b6MKp TIL a patent application was filed for a butt-kicking machine comprising of a seat with a hole in the center, which the user sits upon with his or her posterior exposed to a butt-kicking mechanism located under the seat, which kicks the user in the posterior. This is US Patent Appl. No. 10/977,894.
dDvG8 TIL that in 2006 the Manually Self-Operated Butt-Kicking Machine was patented to advance the art and expand the science of butt-kicking technologies.