At my office, among my other duties, I act as front-line technical support. The following kind of exchange happens far too often:
"My computer gave me an error message this morning. Can you fix it?"
"What was the error message?"
"I don't remember."
At this point, I pick up a large 2-by-4 with rusty nails embedded in the business end, and proceed to beat the living tar out of the person. Well, at least in the privacy of my own mind. In the real world, I ask her to write down the error message if it happens again, like I've been doing since I started working here years ago.