1 Dustin: The Agitated Chamber. Don’t go in until we’re ready!
2 Dustin: Once we step on the floor there’s a 50% chance that ten minutes later the floor will buck up and down violently.
3 Dustin: We need to get out through the door before then.
4 Eleven: That obvious door on the right?
4 Dustin: Have you learnt nothing in this dungeon?!

The Agitated Chamber in the Tomb pf Horrors is a real doozy. Strap yourselves in, we're going to be here a while.