Dean was going on a spiel to Sam about how he needed to try and be safe until he could burn this damn rabbit's foot. Sam had been holding onto you, but had decided to fend for himself after one too many face-plants, trying to spare you from his bad luck. You walk a little in front of him, but stop and turn around when you don't hear his footsteps anymore.
"What?"
Dean asks, stopping too and looking at a beaten up Sam.
"I lost my shoe."
Sam murmurs dejectedly, looking down into a drain pipe. You glance down, noticing that his shoe is in fact missing.
"You've got some at the motel yeah? Try not to lose the socks too."
You respond teasingly, feeling a little bad when he starts pouting. Dean snickers at your comment.
"Yeah Sammy. Stop being such a clutz in front of your girlfriend. That's gotta be embarrassing."