Him: Well, you look tired
[Note: I had on makeup and had stayed in the night before. I felt well rested on my way to work]
Me: Gee, thanks
Him: No, no (shakes head), I said you look tired.
Me: I heard you, and I said 'gee thanks' so you would recognize that it wasn't a compliment but a rude and unnecessary criticism of a customer's appearance.
Him: (silence, finishes transaction)....here's your receipt.
I usually just silently think 'what an assclown' in these situations but this morning I was not in the mood for bullshit.