There is no way a genius like Sherlock would treat a gun like that. I mean, he’s literally scratching his head with it. He may walk on the wild side, but he’s not an idiot.
I watched this again the other night to prepare myself for Reichenbach Falls, when suddenly it hit me.
Where on earth did Sherlock get a gun from, anyway? Not John, definitely.
And then it hit me:
JESUS FUCKING CHRIST.