It was the first adventuring session of a new home-brew game, and I had a Sor1/Rog2 Human who was a lot of fun with a well fleshed out history, personality and was really neat in general. Unfortunately, he was a little obviously too full of himself and died his very first round of combat. We had been travelling for about a day to investigate a mine that had lost contact with the town and we ran across an owlbear. A bunch of the party ran off after it to kill it. I stayed a round with one of the fighters trying to convince everyone that it was safer on the road and that we should let it come to us. While doing this I was casting my Shield/Mage Armor, getting ready to fight if need be. I charged the Owlbear, and it scored a crit on it's AoO and killed me, one hit. The other PCs had no intention of bringing the nancy-boy back to life and took his stuff. I was okay with that, he had a humorous ending that fit with his character type.
Same session I made a new character, a bit more combat heavy, if not as well fleshed out. He was a home-created race called Enfar (a race of gentle giants) Monk2/Bbn1 (we have no alignments in this game). I brought him into the game with a late-arriving PC and proceeded to be a quite successful lookout while we were camping for the night. Across the grass I saw something moving. I walked to the edge of our camp and WHAM! Get pounced on by a Dire Lion. I then roll a 1 on initiative and the lion goes before me, taking a full round and knocking me to 3 HPs. I rage and close with the lion (in our game 5ft steps provoke AoO) and boom, I died. There was some hope of a resurrection deal being made, but alas, this was not to be. The characters didn't want to give up anything for this guy they hardly new. I played him all of 45 minutes.
Same session, character number three rose from the ashes of character 2's burial pyre. Literally. This time, playing a slightly less combat-heavy character who made an effort to stay on the back lines, surely I can survive the session. I was playing a home-brew race "Salamander" (small sized fire affinity lizard people) Sor3. I did survive, sort of. I managed to be infected with the evil corrupting the entire mine when I picked up the focus stone that was causing it. While I was fighting against the stone's influence, the other PCs decided I'd gone all wrong (I was speaking to the corrupt god of Stone that only I could hear) and started talking about attacking me. I played this character as very high-strung and a little paranoid anyway, so I decided not to let them get me when I heard their plans and pulled out my almost purnt out wand of fireball and started going to town. Out of spite I killed the donkey pulling the cart and incinerated the cart with alchemist fires, including a bunch of stuff that had been bought before the trip, most of the food, and my last two character's things. I embraced the corrupt stone out of self-preservation and fought back. The PCs all fled in terror. When I started summoning Ooze guardians who would envelope me and heal me.
Session one ended there. My old PC chased them down as they were running away and, since his new template made him a VERY poor sorcerer, he was killed along with the oozes.
I started a new PC at that session that I still play now, 9 months later. This guy has died plenty of times, but manages to get raised (and we don't lose levels with death!) every time.
Killing two PCs in one session as a PC and turning a 3rd NPC? Gotta be some kind of record, right?