Guess this beats when my party wizard, the last one alive, set all the corpses on fire and threw them at the goblins. I feel bad for the one who wasn't actually dead.
Speaking of which i (being a RBDM) had an NPC wizard use Polymorph Any Object to turn a character into a pebble (20 minute duration) and then used it again to permanently turn him into a rock. hehehe
That site has great diplomacy ideas. I think that if you are telling the truth you use a diplomacy check to convince them that you are telling the truth. Also check out the comic at that site.;)