I've heard stories of people getting two or three disks into a drive...
My kids (when they were pretty small) managed to stack the DVDs in the Player. Astonishingly, it would still play the lower one of a stack until they eventually overdid it and everything became truly stuck.
Took me quite a while and a good number of screwdrivers to expose, and lift off the stack of disks. I still have all the leftover screws lying around somewhere. But I got it back into working order, unlike that mechanical clock back when....