Just a BBC's Sherlock smiley wallpaper wallpaper (lol).
Wallpaper pattern courtesy of vinree: [link]
[John comes in to Baker Street, where Sherlock is casually shooting up a smiley face on the wall]
John Watson: [comes in] What the HELL are you doing?!
Sherlock Holmes: Bored...
John Watson: What?
Sherlock Holmes: BORED!
[continues to shoot wall] BORED! BORED!
[stops, hands the gun to Watson] Don't know what's got into the criminal classes. Good job I'm not one of them.
John Watson: So you take it out on the wall?
Sherlock Holmes: Oh, the wall had it coming.