Where John is shot in the head

[hagstrom]

Hello everyone!

I'm looking for a fic where shot in the head by some man cornered by the yarders and our heroes. Can't remember what verse it was but at the moment of the shooting Sherlock only saw a spray of red and John falling; then assumed his best friend was dead and was intending to kill the man until someone shouted the good Doctor was alive.

Sorry it's a bit vague but it's all I can remember :(