I did get hit by a car, into the path of an oncoming truck. I was 15. My face was pretty smashed up, broken leg and hip, ribs and shoulder, and my mothers first question: You weren't wearing those yellow undies, were you? The undies in question had WOW embroidered on the rear end. And I still have not let her live this down, 30 years later.
My silly misconception: too much TV will make your eyes square. My neighbour had square glasses, and he would nod wisely when Mum or Dad said this.