Sam and Dean go to Hogwarts.

Sam really didn't mean to get trapped with the demon, really he didn't.

"We've got twelve hours of highway to go and I'm bored," Dean said.

The hellhounds were milling around her legs, almost high as her waist: pale white hides and red eyes, long red tongues lolling out between their stained teeth, all of them panting like the exhaust of an eighteen-wheeler and staring right at him.

"Can't we just kill a bunch of elves without having to talk about our feelings?" Dean said.

Sam found a way to get rid of them for almost a month at a time, a spell that lasted until the first night of the full moon.

"Yeah, you boys nailed that trickster real good," Bobby said, dry as dust.

Dean had them heading towards Golden Valley on I-93 when the semi and the fighter jet went screaming by, blasting at each other with what looked like laserbeams. That was crazy enough, even before both of them smashed into the overpass and stopped long enough to unfold into giant robots. (Crossover with Transformers)

Teaching old dogs new tricks. (Set in mid season 3.)

No way had Bobby pulled out some pair of real mystical amulets from nowhere and handed them over like crackerjack prizes.

"Yeah, you boys nailed that trickster real good," Bobby said, dry as dust.

Sam and Dean go to Hogwarts. (spoilers for All Hell Breaks Loose, Deathly Hallows)

It just seemed pretty fucking obvious to Dean: you couldn't get what you really wanted, so you had to take what you could get.