I'll have to get back to you on mine, BUT back in Third Edition when Cypher was a playable character my friend took him in his Chaos army. Cypher had this save where after he lost his last wound he had to roll 2D6 and as long as he didn't roll a 2 he was safe. I think that's how it went, anyway my friend ended up rolling the 2 and lost Cypher, but that's the funniest part this was due to CC with a bunch of Grots. He actually stopped playing with Cypher from then on. No one could convince him to use the model again, ofcourse now he's simply fluff I guess the Chaos Gods agreed with my friend.
I do have a victory story. My Avatar once endured 3 turns of Tau fire back when he only had the 5+ Invulnerable. We counted them up he actually made 80 successful 5+ invul saves during the battle. To my discredit my friend had wiped the board of everything else I had in my army before this miraculous feat took place.