En Serio? What?

I went to meet a friend at First Watch the other morning for breakfast. So after breakfast I returned to my car to drive home and happened to glance at the guy in the truck next to me who was PICKING HIS NOSE HAIRS! What? In a parking lot that was fairly large and well traveled. He was parked directly in front of First Watch so those inside could watch too. What in the world? And he looked at me and continued with his tweezers in hand and looking in the rear view mirror. What in the heck would possess you to do that in the NON-privacy of your car? Isn't that something more well fitted for a vacant parking lot, or even better, your OWN HOUSE or at least a public bathroom or something. A little more discrete location. What in the world?