Hey! Seeing as I am obsessed with Teenlock, here you go!
"Obviously you don't want them to get that letter."
"What?" Dean asked, spinning around to face 17-year-old Sherlock Holmes, who was calmly seated in a chair in the library. Immediately, his outburst drew attention. he other students knew what was going to happen.
"Oh?" Dean Winchester's eyes narrowed. "And how would you know if I had a letter, anyways?"
Sherlock smirked. Finally. A chance to show off. "It's obvious."
"Then tell me, Brain Boy. " Dean rolled his eyes as Sherlock started his explanation.
"Your feet are caked in mud, with droplets on the back of your jeans and shirt, obviously revealing that you took firm, fast steps, splashing mud onto yourself as you ran through a puddle. The leaves in your hair tell me that the branches are fairly low in some parts of the woods."
"How would you even know if I was in the woo-" Dean was interrupted by Sherlock, who showed no signs of having heard the boy's incomplete question.
"The bottom of your shirt is wrinkled and bunched in the back, so obviously somebody made a grab for you but let go quickly." Taking a breath, Sherlock continued.
"Judging by the slightly square-shaped bulge in your pocket, there's a piece of paper, but it wouldn't be important if i was just notes or anything of the sorts- so what could be so important that people try to intercept it? A letter. But, the attacker surprised you, so he must have had somewhere to hide… telling me the forest you were in had thick, tall trees. And then there's your neck."
Dean blinked and stared blankly at the teenage detective, pointing to his neck. "My neck?" Sherlock nodded.
"You keep cracking it, which means you were either constantly looking down or behind… but judging by the angles you're cracking it at, I'd say both. Which means that you had to look out for protruding roots under you… oh."
"What?" Sherlock had attracted quite a large crowd by now (including the librarian, who was too engrossed in the deduction to even think about shushing the students.
The detective grinned at the attention he was getting. John was out sick today, so he couldn't tell the teenager where to stop.
"What is it, Holmes?" Winchester hissed, rolling his eyes impatiently.
"Greensworth Woods." The words caused the color to drain from Dean's face. The teenager quickly regained his composure, though… but not before Sherlock had noticed. The detective chuckled and finished his statement.
"Greensworth. Woods. Tall trees close enough to hide an attacker and shield light from entering but dispersed far enough away to allow rain in, large roots that protrude from the ground, threatening to trip people, semi-low branches, occasional clearances… Dean Winchester, what in the world brought you to Greensworth Woods?"
For once in his life, sassy Dean Winchester was at a loss for words. His boyfriend, Cas, came to get him as the bell rang. Sam, Dean's brother, was obviously trying not to laugh.
After his audience had dispersed, Mr. Holmes noticed another teenager, sporting a ridiculous bowtie, grinning broadly at him. "That was absolutely amazing! Deducing him like that. I'm the Doctor." The boy held out his hand, but Sherlock barely glanced at it. "I am late for class." He muttered before gathering his things and stalking off. The Doctor sighed, but grinned nonetheless. He turned to his friend Mod Mason and her boyfriend Agares so they could go to class themselves.
To tell the truth, Sherlock had almost shaken the boy's hand. But Sherlock just wouldn't know what to do with a friend. That's what he had John for.