The Null Device
Hibiki Kono's wall-climbing rig
13-year-old Hibiki Kono built a machine allowing him to climb walls
; the rig consists of a backpack with two small vacuum cleaners strapped to it, suction pads attached to the nozzles; the pull seems to be strong enough to allow him to climb as high as the power cord lets him. (Meanwhile, some commenters here
claim that Kono merely copied somebody else's design without improving or modifying it.)
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