there is a party in my car

On our morning commute we often stop by the Starbucks drive-thru to get our caffeine on.

Lately, and I shit you not, this seems to be the conversation between myself and the jovial Starbucks fellow EVERY SINGLE FREAKING MORNING:

Jovial Starbucks guy: Hi there, can I interest you in a dolce latte today?

Me: No...no...can I just get two grande Iced-Americanos please, with just a little cream?

Jovial Starbucks guy: Sure--Wow it sounds like you are about to have a party in your car!

Me: Huh?...yeah...heh heh (nervous laughter while I check the back seat to see if there is a party in my car that I have somehow missed).

I mean this is everyday! Everyday! At first I was perplexed...well shit...I still am really or I wouldn't be writing this. Sometimes he does it when I am still at the speaker and other times he waits till I pull around to get my order at the window. And I know it is not my music playing, because often I listen to NPR in the morning and if not NPR, the volume is turned way down (almost off) because I am trying to place my order.

So what to make of this?