Dean looked at you, an energetic kid him and Sam rescued a few days ago, not wanting to go to sleep. You didn't go through this the first times, you'd sleep so easily, but now you got Dean awake at 3 in the morning, unable to sleep.

"Please, kid, go to sleep." Dean almost begged you, he was tired. "We have to get going tomorrow morning, you need to rest."

This would be comical to Sam if he wasn't sleeping his ass off in that moment.