I had to make a little power interceptor board with a current limiting IC to meet hazardous environment requirements for a product. During testing (shorting po

I had to make a little power interceptor board with a current limiting IC to meet hazardous environment requirements for a product. During testing (shorting power through the chip) I decided to stick my finger on there and discovered a pretty cool phenomena. The thermal spike was so fast that it caused you to jerk your finger off every single time, but by the time your finger started to move, the heat was already dissipated to the point where it was completely safe to touch. Everyone in the office had to try it multiple times. No one was able to keep from jerking their finger away even though it was obvious that by the time your finger began moving involuntarily the heat was already gone. It perfectly demonstrated the perception/signal delay alongside reflexive behavior in the human body. Similarly you could use a simple transformer with a battery and use the collapsing EM field to shock them.