I saw this a few years ago and sent it out to a few people but with this ahead of it:
You're standing at a counter waiting for a clerk to issue you a ticket for a train or something of that nature....
She seems quite helpful, and while she is studiously viewing her computer screen she occasionally mutters...
"I don't see anything available".......
Soon followed by....
"No wait, I found something".
And then:
"No, sorry, I'm stuck again"
As the minutes wear on you are at least happy that she is helping you.
Until that point where you distinctly hear her say;
"Damn I need a red 7"