My most entertaining YASD was as a Rogue who had both Stormbringer and a tame arch-lich. Either of those on its own would have been good; the combination was fatal. I knew that Stormbringer and pets don't mix, but thought the arch-lich was so tough I couldn't possibly kill him by accident. Well, I whacked him with Stormbringer one too many times, and he got mad and killed me with a touch of death.