I had a group give up and refuse to go back into the crypt after two tries. Room 2 with the plants kicked their butts twice. They just kept marching right in and getting nauseated. At least 2 out of 5 would fail this roll. The invisible fungus was able to finaly push someone into the planter in the center of the room. It was the party cleric who did not survive. This death and the traps they kept falling into made them quit the first time. The second time they barely defeated this room and decided to push on. They avoided the trap in room 3 by dumb luck. They never had enough people inside at one time to set it off. Next up room 5 they set off the trap and are POed that the door goes nowhere. I mean really POed.
They decide to push on anyway but are grumbling about quitting again. Room 6. I thought for sure I would kill them all here. I tried to enslave the barbarian twice and he made his save each time.
If this guy had turned he would have devastated the group in two rounds. Anyway after a couple of lucky rolls and a ring of major spell storing (never let a player roll randomly for treasure if you do they will get 00 every time) they manage to retreat to room 2 and escape vowing to not return until several levels later if at all. So I'm counting this as a Technical Total Party Kill or TTPK.
Funniest moment for me when the barbarian says that if they jump every other square they can avoid all the pit traps.