Sherlock fights his last criminal in Moriarty's web and comes back home after the fall. He's injured but all he wants is to see John and he goes straight to Baker Street. When John opens the door Sherlock collapses into his arms. John is shocked but also has to take care of Sherlock.

Sherlock shouldn't be too injured though so that John could take care of him at home.

Johnlock slash.

I got the idea from this drawing by reapersun

http://reapersun.tumblr.com/post/29113187477/well-i-came-home-like-a-stone-and-i-fell-heavy