Happened to me once.
My best friend Scottish Rob got drunk round my house and had to be sick, his false teeth shot out into the toilet
He fished them out but managed to knock the toilet freshener down there and pulled the chain.
Next day I took the toilet off and had to put my hand and arm down the hole to get the freshener out. Not a nice job.
Me being my usual self, I had balanced the toilet near the shower, my young son walked in, bumped into the toilet, knocked it over and smashed it to bits.
Taught me a lesson.
Make sure Rob took his false teeth out before being sick in my toilet.