The first time i ever played fallout 3, i roleplayed my character, and the first thing i did when he escaped the vault (apart from stare for a while) was pick up a metal tire rim, and set it rolling down the hill towards Springvale.
I mean, living life in the Vault, the Lone Wanderer wouldn't (probably) have seen a wheel that big. Its just something that crossed my mind the first time i played, and now i do it everytime. Kind of a strange ritual, to remind myself of the first time i played.