December 25th excerpt:

The detective groped blindly at a lock of some kind, and he focused on that. It was a combination lock, one he couldn’t simply pick open and would take far too long to figure out the code for.

“Dean,” he rumbled, eyes darting around the room. It was a wide space, nothing jumped out at him in the shapes he could make out, nothing important, anyway. “I need something to break this off.”

Dean scanned the room, all of his focus concentrated on the task. “Okay, there’s a box in the corner. It’s full of old tools, some wrenches, a pretty hefty hammer–” hefty being so big that Sam and Dean together would never budge it, “–and a drill that looks like it hasn’t been used since I lived in America. Turn right, about three steps. Watch out for the table, don’t want to go knocking that copy of Harry Potter onto the floor.”

“You’re improving,” Sherlock commented as he followed Dean’s directions. Whether it was the stress of the situation or the urgency, it certainly seemed like Dean was showing off at this point. Not that Sherlock was complaining.