I tried to screw in an electrical fuse. This was in asia, the electrical fuse was a white ceramic tube about 1" in diameter with a strand of copper in the center.
The fuse wouldn't go in, so I thought there was something in there; so, I sticked my finger in it.
My arm started to feel the jolt, but I couldn't figure out what was going on. Luckily I was standing on the stool; I lost my balance, fell to the floor and lost contact with the fuse box.