heh...
Something similar happened to me once, in 2nd edition. I was playing a berserker kit, 2nd level, and this haughty elf warrior NPC (DM's pet) kept deriding my skills. I challenged him to a duel, and choose... UNARMED as my weapon. The DM was all smiles, because he was certain he would defeat me easily.. his elf was as strong as I, after all, and 7th level to boot! however.. once the battle began.. I went berserk.. NONE of the subdual damage counted, I couldnt be knocked out, and my punches did real damage where his only did 1 pt real damage per hit. Needless to say, after grappling his NPC and bearhugging him near to death, the dm basicly told everyone at the gaming table that if I didnt stop it I would just be dead because someone would intervene. of course, my friends being the stand up guys, prevented anyone from intervening and I Killed his 7th level elf.