That's pretty bad. It's unfortunate that the group truly believed that fellow to be a bad Dungeon Master. I do have a few stories of my own, though. Keep in mind that I ran an evil roster.
Story the first(The old cleric and the sewer pool):
We had helped some agents of the red wizards seize a town up in a northern area of Faerun. When the power base was secure, the commander of that particular force struck a permanent deal with us. If we were to collect a series of magical itesm for him, we could each take a lesser item from his collection(He was a hording lich). Our first task was to sneak into the keep of the town and take the earrings off of a powerful mage inside.
We had decided against a frontal assault and chose to use the sewers, seeing as we had heard rumours regarding a secret passage into the keep. So, we enter the sewers. After a long, slick walk filled with traps and dire mutants(Experiments gone wrong from the practicing mage of the keep), we came to a giant pool of black water. There was a thin walkway around the pool that required a balance check to cross. Our cleric, unfortunately, rolls a 1 and not only slips in but is crushed to death by the Kraken waiting in the depths.
While we are dealing with the mage, our cleric takes the deal to become a demon despite having a deity affiliation. After the quest, we hire a specialist to summon him and my mage binds him to our party. So, we lost a cleric but we gained an osyluth(I know it's a devil but I put them o nthe chart because they are just too cool).
Story the second(Play me a song, lute man):
At another time, our group was raiding an orcish hold. Being as orcs are in D&D, dire rats are a common enemy here. Our bard, Featherwind, takes a critical hit by one of the rats(It latches onto his arm and stays there, causing periodic damage and inflicting a serious infection). While he's screaming for aid, our warrior decides to take a swipe at the rat. He rolls a 1. I promptly tell him to make a strength roll(He gets an 18). He ended up removing featherwinds' right arm(Which would be grafted back on, thanks to my mages specialization in Necromancy and skill points in anatomy, surgery and vivisection).