When I was a young lad, I was putting together one of those pocket radio kits popular at the time.
It came with an led bulb to indicate when it was on. I happened to grasp one of the wires of the led and one terminal of the 9 volt battery and the bulb glowed a little bit.
It freaked me out than, and it still does now.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission