There’s this guy who invented a safety device to prevent injuries from rotory saws. It all relies on the electrical field generated by human skin, which is different from that of wood, to stop the saw blade within one hundredth of a second. He tested the device with hot dogs, which have electrical properties similar to human skin, but finally he had to make the ultimate test with his own finger. Obviously the device worked. Speaking as a fellow ex-physics major, I can vouch for this kind eccentricity.
Actually ex-mathematicians are more dangerous but we’ll leave it at that.