I used to put shoes on the table too until I mistakenly put a pair there that had been tracked through doggie doos... Superstition or common sense, I don't do it now!

I walk under ladders, have no particular feelings about black cats (but will diligently look for the second magpie and greet them every time) and have knives piled higgledy piggeldy in the drawer.

Witches are well known for not being able to cross moving water (it carries the magic away) and eggshells are their only way over. That's why they should be crushed.

LTS