Popping an eye out isn't quite as uncommon as you'd think. In some instances, a simple act of sneezing or having a coughing fit can cause the globe to pop out. A trick a lot of doctors use is to put a paper clip on the upper eyelid and almost "fold" the eyeball back into place.
Ewww! I hope they sanitize it first.
Eye thingys make me cringe!
I've seen people, (on tv), pop their eyes out for entertainment purposes