More awkwardness with Car Matt

I was talking to Matt on the phone yesterday. We were trying to iron out some details about the car, etc. Well, he was looking something up and I was waiting for him. I have this habit of humming to myself while I'm waiting for things or when I'm walking down the street. I usually don't do it on the phone. But apparently I forgot I was on the phone and started humming. Then Matt says, "Are you humming?" I replied, "Yes, yes I am." Matt, "Oh, that's really weird."