Men in Flats
Disclaimer: Sherlock isn't mine and song belongs to Men Without Hats
John was definitely hearing 80s music coming from upstairs. And it was definitely coming from their flat.
John hugged the shopping to his chest – because the damn plastic bag had broken again – curiosity making him take two steps up the stairs.
John would never forget the next few minutes for the rest of his life.
Sherlock, wearing safety gear, was pouring a bright green liquid into a bucket on the floor, all the while swaying in time to the music.
He quickly stepped back as whatever he'd been mixing in that bucket started to fizz over and produce tiny sparks.
Jumping around in glee, he sang "We can dance, we can dance…"
This continued for the remainder of the song, ending with Sherlock doing a really awkward robot.
John would never let Sherlock forget either.