Stanley Meyer's water powered Buggy.

Stan Meyer's Dune Buggy that ran on water.

The water fuel cell is a technical design of a "perpetual motion machine" created by American Stanley Allen Meyer (1940 - 1998). Meyer claimed that an automobile retrofitted with the device could use water as fuel instead of gasoline. Meyer's claims about his "Water Fuel Cell" and the car that it powered were found to be fraudulent by an Ohio court in 1996.

https://en.wikipedia.org/wiki/Stanley_Meyer%27s_water_fuel_cell