OK, this one's my real fondest memory.
Back when Kelmoria was around, I played a lumberjack living in a small house near a village. Me and three others were there, and an admin was flying around as a bat. We all drew swords and swung at them blindly. They changed to a dog, a ghast, and a bunch of other stuff as they swooped down to hit us. ( I got like, two hits in >_< )
The guy I was with betrayed me though, and killed me. But it was Kelmoria, so yah know :/
I also tricked a guy into thinking I was a noob once, then, using the unarmed glitch that ignores armour, three shotted him.
I laughed for an hour straight.