i got this ornament here on a discount when i worked at the pet store. LOVED IT and as soon as i got it home i put it in Milly's tank.
i was a bit hasty, and i guess i didn't inspect it very well. i thought it was solid for some silly reason. well one day, i find that my amel has decided to turn it UPSIDE DOWN and crawl inside. she had about the first 4 inches of her head & neck in. and she was really, really stuck. it took much mineral oil and a bit of gentle pulling to get her out. she had a nasty "scar" for quite awhile. it has almost 100% shed out, but i can still see it. you wouldn't be able to if you didn't know it happened, but it's there.
my other experience with evil ornaments is this one:
i had a pastel ball python get stuck FULLY INSIDE this ornament! i went in the room one day and saw her head poking out of the hole in the front, above where the mouth opens. i FREAKED!!!!!! i thought she was waaaaaaaay too big, and that there was no way she would fit in there, so why would she try and go in there?
WRONG. snakes don't know how big they are, lol.
luckily, she came out fine. i didn't even have to cut it open or anything. she wasn't completely stuck.