I decided to play a trollish healer, and took on Keethrax at level 9 with no problem. On the way back, I got surrounded by 6 cave tigers in a corridor. No teleportation, invisibility, meat, or anything that might help. I thought they'd leave after a while if I just don't attack them (they can't hurt me because I'm a trollish healer), but stood there for 12 in-game hours without that happening. Then I noticed that there's a corruption trap 4 spaces away, and some tigers were repeatedly stepping into it. So I waited until two of the tigers turned into WMoPCs, then killed those, but then the remaining tigers no longer step onto the trap.
I look through my inventory and find a pickaxe. I dig one square and make my escape.
I'm so proud and ashamed of myself at the same time.