Dean watches him , thinks about following him , but does n't , stares at the bathroom door as it swings shut behind his brother 's back . The door is n't closed , but he ca n't see Sam anymore , only hears him moving slowly around the small room . The silence stretches between them until he swears he can feel it suffocating him .
He clears his throat awkwardly , relieved that Sam ca n't see him right now .
Emotion: Fear