Why do you think I'm overly self-concscious?

So the bell in my headset goes off, letting me know someone had pulled up to the menu board last night.

"Thanks for choosing McDonald's, how can I help you?"
"Um, gimme a second to think."
30+ seconds tick off"Hey, I think I've changed my mind."

Now this is very odd, people normally just drive off if they do that--usually gunning their engine as they do so, as if to express anger that our menu and their late night cravings (and/or cash) didn't match up.

"Sorry to hear that, have a nice night."
"Don't worry, it wasn't your voice or anything...you didn't do anything wrong."

And they drive off politely.

What the *BLEEP* is wrong with my voice?!?!?