Me too. A light socket was apparently powered via two separate circuits. I turned off one but not the other. Idk what was happening because I touched a live wire with my hand while my elbow brushed a metal door jamb so I think the juice flowed through my forearm and not the rest of my body. Made my arm buzz, but didn't really hurt and I was able to let go. New rule is just turn off every circuit in the house every time.

Just in case you're not aware of them, there are screwdrivers with voltage detectors[1] that you can (should?) use to check that there's no power on the thing you're working on.

[1] e.g. https://www.amazon.com/100-500V-Electrical-Screwdriver-Detec...