One of the humorous highlights of my life was being stuck in the back seat of the family station wagon on some ungodly vacation trip. I was 14, my sister 12, and my oldest half-brother was four. My baby half-brother was in the front seat with my mom (and somehow survived).
We were doing something, don't remember what -- maybe the license plate game. Anyway, my half-brother got annoying loud. My mother turned around and told him to be quiet or she was gonna stop this car...
She turned back around and my little four-year-old brother shot my mother the most perfect, fingers in the exact right place, full bird salute.
Of course a couple minutes later my mom threatened to stop the car again if my sister and I didn't stop laughing and tell her what was so damn funny.