Heading into the CoC with my Trollish Barbarian, no outstanding gear but rolling along fine, when I happily find a chaotic altar on D:1. I bring piety up to "very pleased" and start heading down to the Arena, but when I get close I can't find the down stair I need. After not finding it for a while, I head back up to D:1 to pump up my piety some more and clear my mind, sacrificing whatever inventory trash/monsters I can find. A kobold shaman pops up near the entrance, so I decide I might as well bait him to the altar and add him to the fire, eh?
Suddenly I find myself dead with no health lost and no monsters around. I bewilderedly check my last messages to find to my horror that IT sacrificed ME. That'll teach me to stand on altars carelessly <_<
RIP in wasted Teleport Control