Mine would be the time my dad rigged a harness and “hung” himself from the carport beam, dressed to look like a stuffed Halloween decoration. He would grab at the bigger kids and parents when they came up to the door for candy. Scared the living bejeezus out of them.
My mom really got into Halloween when I was a kid. Even as I got a little older and not that into it she still decorated the house and put on a tape of spooky sounds that played through a boom-box hidden on the front patio when she would hand out candy for trick-or-treaters.