Except for maybe the 1900 self-spanker — that had possibilities (#10).
1932: Iron Dynasphere, Car of the Future. "J.H. Purves imagined that...his electrically-driven unicycle would roll like tumbleweeds alongside more conventional vehicles." Not shown: Purves was decapitated by a delivery truck.
Via: popsci.com
Get the FUCK outta here with that Dead Man See-Sawing piece of crap. Just watch my man Vinnie Jones.
A head electrocution waiting to happen.
Via: wonderscissors.tumblr.com
Hair perming apparatus, 1920s Germany. Another head electrocution device.
Via: retronaut.com