A failed heat-pump test created a billion-dollar water gun. π¦ . . . In 1982, Air Force engineer Lonnie Johnson connected a nozzle to an experimental heat pump at home and blasted water across his bathroom. He turned the accident into a pressurized toy, licensed in 1989 and sold as the Super Soaker in 1990. A machine meant to move heat ended up soaking millions of children.
Source
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