Kevin Kohler (a.k.a. “The Backyard Scientist“) built a custom fidget spinner out of an 1/4” aluminum plate with 3 E sized rocket engines strapped to it.
Out in the garage casting some aluminum, and playing with my new giant fidget spinner. And now I'm bleeding pic.twitter.com/wHf4c4mn0x
— TheBackyardScientist (@ChemicalKevy) May 25, 2017