Sometimes the users get so focused on an issue they're having that they can't listen to the solution.
User: Something's up with my computer. I can't log in from home. Can you check it out?
*User calls again, 6 minutes later*
User: I still can't connect. Didn't you say you were going to fix it?
Me: I'm running some diagnostics on it, so you won't be able to connect for a bit.
User: Ok, I'm trying it now.
Me: No, it-
User: It won't connect.
Me: I know. That's what I'm saying. It's going to take a while before I can fix the issue, so you won't be able to connect for a bit.
User: *Click* Grr! It still won't connect!
Me: Would you like to try a Burrito Supreme?
When has something funny happened to you because someone wasn't listening to what you were saying?