[RKDinOKC]

In electronics class in HS we made a very impressive looking handwriting analysis tester. It had all kinds of oscilloscopes and boards with tubes glowing etc. Basically it was a pencil and a sheet of paper with aluminum foil under the paper. The pencil and foil were hooked up to a bank of capacitors that gave a very startling shock. We had it so it was hooked up to the scopes making neat waves and stuff While you showed how it worked, then flipped the switch for a new "test" and it instead hooked up the caps. Amazed me how many fell for it. They thought they were actually safe because they were holding a wooden pencil with wires connected to it and writing on paper with wires connected to it.

Amazing that no-one in our class ever got shocked by all the TVs we worked on. Something about making sure we grounded out the tube and transformer with a huge screwdriver after anytime they were plugged in.