"I'd rather I didn't die, too!"

The excessively tough flooring seems to have several layers to its excessive toughness! The protection's centered around what the scanner says to be... slots. In the ground. They are person sized. Sort of like someone's placed coffins underneath the floor, and then covered them in every protective magical and mundane force they could get their hands on, to keep them safe.

... This is not like an ordinary prison.