We've all been there. Mid-run (or mid-raid) a group mate will come up with possibly the strangest excuse that you've heard in your life for why they're leaving. Hell, maybe you're the one with the excuse. Who's got some funny stories about people splitting in the middle of a run that left you scratching your head afterwards?
I'll start us off;
Just about nine months ago, our guild was doing a Blackwing Lair run for some free cash and to try out some newer guild members. We'd invited a rather good priest to come along, and he was doing great up until midway through the Broodlord clear.
[Priest]: Aww, crap. Sorry guys, I have to go AFK for about 10 minutes. It's the peak of my wife's fertility cycle.
[Raid Leader]: Er... okay.
[Priest]: Really sorry, be back ASAP.
[Raid Members]: WTF? He has to be joking.
4 Minutes, 32 Seconds Later (Yes, I went back to check the chat logs later)
[Priest]: Okay, I'm back!
[Me]: Uhm... didn't you forget something?
[Priest]: ?
[Me]: ...nevermind.
Two addendums to this story; about two weeks later, his wife got onto his account and deleted all of his characters. (I WONDER WHY!) He did eventually get his characters back, though, after making some deals with his wife (they work different shifts, so he plays when she's at work). The next time he was in a raid and said he had to go AFK to deal with a "wife thing", he was gone for about a half hour. Good man.
Second addendum; she's due in about a week. I went back to check on my DKP site, and it will have been about 9 months and 1 week (standard gestation period) since that Blackwing Lair raid.