Sherlock Holmes, your friend since you were little, you live not far from him and you have seen what his apartment looks like and what condition it is in.
But he didn't tell you that, the newspaper said that he was taking ages to solve a case, so you already knew that he would be finished.
You just walk into his apartment and find yourself in chaos, there are cups and paper everywhere. The plants are dying soon and it smells as if he hasn't opened the windows for days and Sherlock is standing in the middle of it all.
He is wearing a bathrobe, his hair is messy and you can clearly see from his face that he is suffering from a lack of sleep, who knows if he has slept at all, let alone eaten anything.
After repeatedly arguing with him whether he is going to sleep or not, you gave up and started to tidy up his apartment, he is standing in front of a wall and staring at some notes. When you put something to eat on the table for him, you look at the notes too.
But then you unconsciously say something about the notes, which is actually completely obvious, and Sherlock almost chokes on the food.
"Of course! Why didn't I notice that! Ohhh thank you! You're an angel! Thank you!" he says suddenly, you get a fright and look at him a little confused.
"What you said... is helpful... Whatever, thank you, but yes-" he says again, while he suddenly writes something down and seems wide awake again.