As he was finally driving to his sister's house, John started thinking about the last time he saw her.  He was trying to figure out how to react to finally seeing his twin after his service in the army. He pulls his car up her driveway and parks it. He steps out boots first, as he was still in fatigues. John then walks up to the door, knocks, and assumes the classic military stance of feet slightly apart and hands behind his back out of force of habit.