This idea occurred to me reallllllly late at night... so that explains stuff. Once I made the connection to Alan's "wolfpack" and then the Marauders with Lupin's lycanthropy... well you can work it out.
I own neither the Harry Potter series or the Hangover films.
The light streamed in through the tiny window situated right in the top of the cell wall, illumating the dirt and blood streaked face of the prisoner lying practically comatose inside. The bright light burned through his eyelids, causing his alcohol fazed mind to finally stir.
"Urghhhh..." Sirius Black moaned and attempted to roll over in what he assumed was his own bed back at home, he was soon corrected as he promptly rolled off the narrow prison bed and landed painfully onto the cold hard floor with a loud thud and a yelp. "Shit!"
"That you, Padfoot?"
Staggering to his feet, he turned round and saw a bleary eyed James, missing his glasses, squinting at him from the bed on the other side of the cell. "Merlin, my head... where the hell are we? Shit, what time is it? Lily's going to kill me, we're meant to be meeting with her parents! Can you see my glasses anywhere?"
"I think we've got bigger problems than that, Prongs," Sirius replied, wincing as he touched his lip to find it burst. "Looks like we're in one of those Muggle jails." Suddenly realising something, he patted at his jacket and then knelt down to look under the bed. Sitting back on his heels he groaned and added, "And I dunno about you... but I don't have my wand."
"I can't remember anything from last night," James moaned clutching at his head, his usually messy hair matted and totally wild.
Sirius shook his head then winced. "Me either. Well at least Moony and Wormtail aren't in here with us, that means they'll be along to get us out of here soon enough."
"Unless they're in another cell... or worse," his friend pointed out. "We could be here a while."
Short I know, but I wanted to see if people would be interested in the idea before I turned out a million chapters lol.