@LadyAcappella: This has only happened to me once as a consumer (I'm new to mystery shopping). The woman in the drive-thru was unintelligible on the speaker at the menu board, and when I got to the window she literally stuck her hand out with her back turned to me while she was having a conversation with another employee inside the store. I had no idea what my total was, and she never said a word to me.
I was so upset that I contacted the fast food company via their website to complain. I got a call from the regional manager to apologize and offer me coupons. I refused the coupons and just asked her to make sure this never happens again. I usually get great service at this particular location, and I had never seen this woman before (or since!). I think they canned her.