Dean doesn't know what wakes him, but it's dark in his room. Mommy always turns on his Batman nightlight, even though Daddy says big boys aren't afraid of the dark. The light comes on, but it's jumpy and he hides his face from the flickering shadows.
He hears Mommy calling then screaming, and Dean thinks Sammy and tries to make himself brave enough to go see. He does, and there's fire, but then Daddy's there, handing him Sammy and telling him run. He stops outside and he's scared, but he doesn't tell Sammy. Dean pretends and tells him it's okay.