Don't Walk Under Ladders is what clued me in to the practical origins of most superstitions. Like duh shit falls off ladders. Though Hats on Beds I'm still not sure about. Mercury poisoning?
In science class when I was about 15 the teacher told us how you can stick your finger in mercury and it will come out dry.
Then he left us unattended with a huge tub of mercury and told us not to touch it 🙄.
I've been waiting to die ever since.
