While you are drying your long, dark hair after the shower you just took, you can hear John's heavy steps coming up the stairs. You hurry up, fiddle with your clothes and than leave the steamy bathroom with the open window.
"Hey, John" you greet with a soft smile, as you see the doctor standing in the kitchen.
He simply nods at you, while leaning at the wooden table, full of Sherlock's experiments. He chews on the cookie he had put in his mouth before you entered the room. With a gesture towards the plate with Mrs. Hudson's cookies on it, he offers them to you. First you actually think about eating one of the delicious chocolate crisp cookies, but then your mind reminds you of how fat you are and you shake your head and add:"No, thanks"
You turn away from John Watson and take a deep breath and count to 10, you once read somewhere that it is supposed to calm you don't, but it didn't really work.
While facing the living room, you realize that Sherlock's still sitting there, in the exact same position as you left him to take a shower. Your eyebrows raise as he starts fumbling with his hands in the air. You back away a step, and return your round eyes to John, who's currently eating his 5th cookie, and not noticing your confused look.
As you clear your voice, he looks over to you with a questioning look on his face. "What?", he asks with his small hand in front of his mouth to not spit any cookie crumbs. You point with your head towards the strange-behaving Sherlock Holmes.
"Oh, that..." John begins and chuckles lightly, which only make you raise your dark eyebrows even more. "He...Sherlock is in his mind-palace."
"You gonna tell me what that is, or?" you wonder after a short pause of silence .
"Yes. The mind-palace is a place, where Sherlock keeps his thoughts and knowledge. So when he has a case or something, he can easily enter that imaginary room and review all the information. It's like a huge book, that you can read and where you can search for something you oversaw the first time"
"Oh" , you just exclaim, before John can say anything else Sherlock jumps up from the leather couch and looks at both of you.
"Good, you're both here" Sherlock states, "We got a case"
And with that the tall men took his scarf and coat and ran down the stairs. John followed him without even asking. You just keep standing there in the kitchen and look at the place where you got the last glance of the two men disappearing.
You turn around and head to the couch, trying to figure out what the bloody hell had just happened. You are so fixed on your thoughts, that you don't hear someone coming up the stairs. Sherlock pops his head through the entrance door and looks at you wide eyed. "You coming?" he asks, with a wide grin on his Greek-godish face.
"Sure"you answer without hesitation, you stop worrying what that behavior is all about, and just follow him downstairs. Out the door you see a cab standing on the street. A familiar hand waves from inside the cab and you quickly walk to the excited John who's hand waved you to the taxi. Sherlock is right behind you, he tells the cabbie the address, and the car starts moving.