Some Insect-Rabbit Hybrid
So this is sort of inspired by 8.08 / Hunteri Heroici and our glimpse of Dean's love of cartoons.
Dean's sitting in a hotel room after Sammy's gone to sleep, John's out on a hunt and won't be back for a few days. It's dark and quiet, and the older brother can't sleep. Won't sleep. Dean doesn't like falling asleep when he's alone with Sammy anymore, this is pretty recently after a close call with a rogue monster, and now Dean's scared to let his guard down again. Mostly for the safety of the little boy, but also in fear of his father's angry, drunken wrath. He knew that John would never hit him, but sometimes it came so close that sometimes he lost that certainty.
So, to keep himself awake he turns the TV on, the volume real low, and flips through the channels until he lands on some cartoons. Memories of his short-lived childhood come rushing back, it's been years since the last time Bugs Bunny's voice filled his ears. And maybe he's supposed to be too old to enjoy cartoons now, maybe he shouldn't have to bite down on his hand to stiffle laughter, worried about waking his brother.
But it's just Dean, might as well be alone in a hotel room, and something about watching these animated characters dance across the screen makes warmth flood his body, something he almost never feels anymore. Maybe it's the familiarity of them. Maybe it's finally being able to feel like a kid, in 30-minute intervals interrupted by the occasional commercial break.
Or maybe it's because the last time he watched cartoons was November 2nd, 1983, curled up on the couch with a crustless peanut butter and jelly sandwich, comfortable in his mother's lap.