Chick
Well-Known Forumite
My theory: John saw Sherlock fall, but not land due to a) being hit by the bike and b) Sherlock positioning him during the phone conversation so John's view of the ground was obscured by a low building. Also there was a conveniently placed rubbish truck that drove off after the fall which I think is where Sherlock landed with the body on the floor being a corpse provided by Molly. John was dazed after his fall when he finally fought his way through the crowd and just assumed it was Sherlock