"That inept sycophant!" Mycroft fumed, slamming a textbook on his desk. How could his brother take his car keys? Where the bloody hell did he need to go anyway? Mycroft was due for another presentation for one of his interviews in… he checked his pocketwatch. Four hours! How inconsiderate, not that Sherlock actually considered anyone else's feelings. "I should be used to this sort of behaviour," Mycroft reprimanded himself, "it's typical."
As soon as he heard the garage door opening, Mycroft was at the door, ready to confront his brother. The door flew open, nearly taking Mycroft's nose with it.
"Sherlock! I have an interview in…" Mycroft glanced at his watch again. "Three hours, five minutes and 24 seconds! I don't understand why you would so ignorantly take—"
Sherlock thrust a cup of coffee into his older brother's hand and tossed a paper bag at him, which Mycroft barely caught without spilling the liquid caffeine.
"Fact. You have circles under your eyes. Fact. You're irrational and irritable. Fact. You've been studying in your office for hours and obviously through the night. Deduction. You've got a presentation, a speech or something, you mentioned an interview, and you're noticeably nervous. I figured you'd need something to keep you awake and calm during the presentation, so coffee was an obvious choice. Lots of caffeine so you don't feel the immediate need to pass out unconscious. Warm drinks are statistically proven to be calming to nerves so hot coffee. Additionally, I've gotten some bagels because I'm just guessing you haven't eaten in roughly…" Sherlock checked his own watch. "Thirteen hours and hmmm… 37 minutes. Good luck, although you won't need luck, but rather, pure skill. Good day."
AN - Funny story... I thought I posted this one yesterday but it turns out, I didn't! Apologies, but here it is now. Hope it's to everyone's liking.