Caught in a Lie

Often when I catch Sam doing something he shouldn't he'll ask me how I saw him doing it. I once used the typical Mom response "I have eyes in the back of my head".

Fast forward to this morning.

We had been grocery shopping and on the way home he was doing something in the back seat and wanted me to look. I said "I can't look back there because I'm driving!". His reply: "Well Mom, you could just look with the eyes in the back of your head!".

I can't decide if he was being cheeky or if he really thinks I do have eyes back there!