Not that I'm supporting the ethos but, one occasion when we should have left the computers to it:
Dramatis personae: Ol' Skip, Bas, Heavy Crew FO.
Scene: A calm B744 flight deck - night.
Bas: (Bored and looking at fuel config) "Bally heck, the stabiliser fuel hasn't started to transfer."
OS: "You're right, I wonder why?"
Bas: (Following fag packet calc) "We'd have to land by Delhi before we're out of trim, so we've got five hours."
OS: "Lets get the heavy crew up to see if they have any ideas."
All: "Hmm." "That's odd." "Is it nice in Delhi?"
HCFO: (Eventually) "It's not meant to transfer yet; the centre tank contents to trigger the transfer have been reduced. Didn't you read the tech advisory?"
All: (except HCFO) "Umm."
Calm returns.