Most angry I think I've gotten in leveling roulette was doing cutter's cry for tomes on sch at 50 pre-expansion. Was a messy struggle to the end (when normally fairy can solo heal) and the party just could *not* manage chimera. Tried to help all I could, but there was no improvement. At 5 minutes left on the dungeon timer, the others left. I was pissed that I wasted a whole 90 minutes and got absolutely nothing to show for it - not even exp.

DF is a mess. Most of the time it works well, but the negative roulettes come to mind much easier. I took at least a week break, if not longer, from low roulette after that one.