I froze as I stepped into the room. I knew Holmes had been busy all day- and night, by the looks of it- while I had been visiting a patient and had been forced to stay the night, but I was not expecting this level of eccentrics. Even for Holmes.

"Er, Holmes… what exactly is that?" I asked with no small amount of trepidation, staring at the wooden contraption. As soon as I asked, I wondered if I really wanted to know the answer. This was, after all, a man who kept his tobacco in a Persian slipper and had decorated the wall with bullet holes.

"A catapult, Watson," he said, beaming at his device.

I felt a sinking feeling in my stomach. "A what!?" I asked.

"A catapult. It is a medieval-"

"I know what it is, Holmes. I meant, what the deuce possessed you to make a catapult, and are you planning to use it?" I quickly interrupted him before he could delve into one of his long-winded explanations.

"I was bored, and yes. Would you like to test it out with me?"

"Here!?" I asked incredulously, staring at the flat and the soon to be demolished street. Even for Holmes, this was insane. "Would it not be prudent to send out evacuation warning before we begin turning Baker Street to rubble?"

Holmes shot me a dark look.

LINELINELINELINELINELINELINE LINELINELINE...

"Ready…aim… FIRE!"

The first projectile launched itself towards the empty house across the street, where so many fateful memories had been made. It crashed into the window, shattered the glass, and sent the people on the street running for cover.

"FIRE!"

The second projectile broke another window, to much the same effect as the first.

"FIRE!"

A prudent observer took one look at the two madmen shooting a catapult out the window and did the smart thing: ran off, appearing a minute later with a Yarder close behind him.

"Er… Holmes?" I tapped him on the shoulder and pointed to the Yarder.

Holmes muttered a word that I do not see fit to reproduce in this account.

"MR. HOLMES, DOCTOR WATSON, WOULD ONE OF YOU KINDLY TELL ME THE MEANING OF THIS?" Inspector Lestrade thundered.

Holmes and I exchanged a look, before turning to look meekly at Lestrade.

"Er…."

A/N- how did I do? I hope I did okay, this idea's been bugging me for a while. R&R, por favor! (for those of you who don't speak Spanish, that means please)