Just another day at the office (or perhaps I should say, one for the Scary Devil Monastery):
luser: Yes, <function> doesn't work.
me: Have you run <utility I wrote to correct this problem>?
luser: No.
me: Okay, let's run it now.
luser: I already tried that.
me: Um... you just said you hadn't.
luser: Oh, no, I did. I did.
me: Oooookay... let's just try running it once more, then.
luser: ...It's working now. You must have done something on your end.
me: No, I didn't.
luser: Well, you must have, because it didn't work before.
It's a very good thing for all concerned that we don't yet have the technology to reach through the telephone and strangle people.