My favorite post from the (finally updated!) Computer Stupidities page:
"First call, Monday morning. I knew it was going to be one of those days right from the start. The call wasn't going well at all. Bob, the customer, just wasn't getting it.
Me: Ok, Bob, type a capital 'B', then press enter.
Bob: A capital B?
Me: Right, capital 'B' as in Bob.
Bob: Capital 'B' as in Bob?
Me: Exactly. Capital B as in Bob!
Bob: (long pause) That's the one with two loops, right?
He became known as Two-Loop Bob from that moment on. His saga has been passed down from each call center generation to the next."
"Two-Loop Bob" shall henceforth be my univeral put-down. Muah.