Fourth tooth

Noah lost his fourth tooth in the back seat of the car!  I was talking to someone after school next to the car while the kids were getting in.  Noah, trying to get my attention, flailed his arm, which hit  his own chin, and then his tooth fell out!  Then he really needed to get my attention because he wanted to get out and show his teacher, Cathy, who was still at the gate!  The lower right lateral incisor is out!  I can't believe this is #4 baby tooth!  Here we are later that night celebrating with a milkshake.  When are those top teeth going to come out???