Well, products would probably be like:
The Deluxe Edition “No Strings Attached” Trap Door: specially built for use in elevators. Operated by your choice of button: a randomly rotating floor, or people too impatient with the "open" button.
The Second Deluxe Edition Trap Door: due to popularity, this one is built specifically for use in airplane toilets. Operated by the flush. (With the help of cabin depressurization soon after.)
“Who Needs a Metronome When You’ve Got a” Speed Bump: This carefully constructed speed bump is meant for areas where street lighting is lacking. The bump is sudden, and high, and instead of yellow stripes has a painted cat (other animals upon request) to ensure the driver learns to drive slowly in dark areas.
The Dental Demumbler: Finally have coherent conversations between dentist and patient! The Demumbler translates the mumbled comments and replies of one with drills, mirrors and whatnot in his/her mouth. (Buy now and get a complimentary copy of your favourite dental movie: Jaws.)