Ewwww
I once had an elderly client, who had to go to hosptial for something or other, which resulted in him having an xray of part of his head.
Very clearly, on the xray, the doctors discerned a large open safety pin deep within his ear. He did recall cleaning the wax out with a safety pin "ooh, months ago now..."
An appointment was made for him to go back the following week to have the pin removed - but when they took another x ray, it had gone! He had no idea what had happened, had not been in pain or noticed anything unusual.
There's a lesson in there somewhere, I'm sure...