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Description:  The treadmill was first seen in The Flash #125 written by John Broome. It was initially developed as a means of allowing Barry Allen to travel through time precisely to battle aliens who had taken over the Earth in 2287 by projecting a hive into the past that stopped technology, so Kid Flash traveled to the past to stop it while the Flash battled the aliens in the Future. Kid Flash succeeded, enabling the aliens to be defeated. The Flash had already travelled through time to return a Future criminal to his own time using superspeed vibrations in his second story, and passing through a 'roadblock' in the mists of time called the Time barrier.