Ive found lots of interesting things in vacuum cleaners, including rubber bands, pennies, torn up dollar bills, Crayons, Legos, and even a Barbie-doll shoe lodged behind a cranny in the cleaner head of some sort of Hoover wind tunnel bagless with dual clean, I forget the model number. I have a couple of stories:
I was cleaning out my parents vehicle with my Kirby G3, and I stuck the crevice tool down a crack between the seat and the console, and a second later I heard a very loud thwack! At first I thought my Kirby fan was going to break but it didn’t. Afterwards I checked the emptor, and there was a dime in it that had been bent! Moral of the story, don’t use your Kirby to clean out a car! Chuckle
However, the best one was: A family friend sucked up a hot ember with their central vac. A little bit later, they smelled smoke and couldn’t figure out where it was coming from. They went room to room, and when they got the utility room, they opened up the vacuum cleaner, and lo and behold, the bag was on fire! I think it took them at least a week to get that thing fixed and cleaned up, but it still worked fine afterwards.