Five year old Dean Winchester plucked the offending marble off the floor and glared at the son of their next door neighbor accusingly.
"You can't leave that lying around," he said angrily, "it is dangerous. Sammy could choke on it!"
Dean always made sure that no small things were within Sammy's reach. His mommy had told him how little children put everything ino their mouths, and how it could make them choke. Now that she was... well, it was his job now to make sure that Sammy was safe. He was Sammy's older brother.