Lots of weird stuff can be found in progress dungeons. I've walked in on dungeons in progress where all 4 players were replacements for the previous group, and we would have to piece together the murder scene of missing enemies and open treasure chests. I had an AK run once where we discovered about a dozen enemies from the previous room STUCK at the bottom of the pit in the Demon Wall room. Apparently they chased a player down there, and couldn't get back to their original positions.