Because I'm a dirty procrastinating procrastinator who isn't working on the next chapter to Million Little Things or working on my Big Bang/DC-Everafter challenge stories.
It was also requested.
This is what happened.
Sam and Dean watched as Cas' head dipped, snapped up, dipped again.
"Cas, maybe you should take a nap or something." Dean finally said, when the angels head had thunked back against the window before snapping forward again.
Cas glared over at Dean, crossed his arms over his chest, "Angel's don't sleep."
"Well apparently you need to." Dean approached Cas and tugged on the sleeve of the trench coat, trying to get Cas upright and over to one of the beds. Sam watched with an amused smile on his face as Cas tugged his arm back, glaring at Dean all the while.
Sam watched, eyes ticking to Dean, to Cas and then back to Dean while Dean tugged on Cas' arm, trying to get him to a bed.
"I don't need to sleep Dean." Cas snapped, tugging his arm back so forcefully he nearly hauled Dean onto his lap.
"Then what's with the bobble head action? Get on the bed and take a damn nap Cas!" Cas' brows drew together in the universal sign that said 'I don't understand that reference.'
The arms re-crossed, lips pursed, "I don't want to Dean."
"What are you? Four?"
"Dean." Blue and green eyes locked in a glare, Cas all but pouting like a sleepy toddler.
Finally Dean sighed, "If you sleep for thirty minutes I'll get you a bottle of tequila."
Five minutes after that Cas was snoring on the bed.