Simple “Troll Science” exemplifying department store perpetual motion. The energy harvested from an eternally-rolling person can power up to three homes for an entire winter before the store manager presses the emergency stop and kicks the roller out of the store.

Image version of my t-shirt design for those who think it may make a great postcard or wall poster (hint hint).

Tee shirt version can be found here:


funny, sign, science, troll, impossible, comedy, fun, blah, ha, fall, injury, gravity, physics

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