Something happens here, later in the plot.
Sherlock theories and spoilers below the cut.
My flatmates and boyfriend and I have been throwing around theories about the faked death, and we don’t all agree on how the actual fall was survived (I’m still somewhat suspicious of a fall of that height not at least inducing broken bones).
There is one conclusion we’ve managed to draw.
You may have noticed John took his pulse. John’s an army doctor; he won’t have been so easily fooled. And it’s quite clearly Sherlock on the ground.
Yes, you can make the argument his pulse dropped out only to be revived at the hospital or whatever.
But instead, I’d like to draw your attention to that little rubber ball Sherlock was bouncing around earlier.
Stick a rubber ball correctly under your armpit and it stops your pulse in that arm.
Molly, of course, was then necessary to pronounce him dead even though he wasn’t, and presumably find a suitable replacement corpse for the funeral.
Innocent little bouncy ball.