Here are two ideas that people thought had enough merit to spend several thousand dollars patenting.
Some one actually patented a pogo-copter: take a pogo stick and helicopter blades and wheels and voila! You get the pogo-copter (1969)!
What better protection to go along with your pogo-copter than airbag underpants when you fall on your derrière.
"These brainy briefs feature accelerometers that detect a tumble in progress, sending compressed gas into balloon-like pockets throughout the knickers."
In case you want to license these technologies, technical descriptions for the pogo-copter aka "Jumping Device With Driven Airlift Blades " and airbag undershorts aka "Airbag inflation device" are here and here respectively.
Check out the other ridiculous ideas at the links below.
Via Wired and IZ Reloaded
