Open up the file of the last fic you worked on, copy the very first sentence of that fic (no cheating!), add it to the bottom of this post, and reblog.
“The floorboards creak underfoot, each of John’s steps accompanied by that groaned warning.”
“Sherlock hadn’t expected to be smitten with his new posting on first sight, but the ship is beautiful: a gleaming, elegantly efficient disc cradled in its berth in spacedock, waiting for its crew.”