I’ve seen a few people put their delivered pizza in the oven after everyone grabs a piece to keep it warm. I’ve also seen a lot of those people forget the pizza is in there and either have to throw it out or only noticed after they preheated their oven.
My ex used to hide dirty dishes in the oven. One time I was going to make something and started pre-heating the oven not realizing she was squirreling dishes away in it. We lost a bunch of tupperware containers that day, which essentially melted down through the racks and onto the element.
To this day I always check the oven before turning it on now, even though we haven’t been together for nearly 20 years.