When I was in high school, a girl in home ec. sucked a needle down her throat. Luckily it went straight through.
My daughter, at less than a year, picked a pin up off the floor and before I could get to her, she swallowed it. Took her to ER and they took an X-ray. Thankfully it was a big headed pin and it went head first, not point first. Just had to wait for it to pass through. That was fun. I saved the pin and put it in her baby book.