One time in a DND game I had a dungeon with the property "you'll never find what you're looking for". This has a bunch of fun effects. Among them when the players found a spiral stairway around a hole, they tried to find the bottom and, because of the rule, could not reach it. They tried to go back up, and couldn't reach the previous floor either.
So they decided, since they have feather fall, to just jump into the central hole and find the bottom that way.
They fell for an uncomfortable long time. They passed the other party members who had split up (and couldn't find them).
Good times. Players heads were very fucked with.
They did eventually figure it out.


