In the most recent episode of Sherlock on BBC 1, Sherlock Holmes, when confronted with Moriarty’s plan, jumps from the top of St Bartholomew’s hospital. If he didn’t, the assassins would have taken out Watson, Lastrade and Mrs Hudson. My sister Emily has a theory as to the way in which Holmes was able to execute the jump while remaining alive for the final scene.
The four most important details are: the fake story that Mrs Hudson had been shot; the fact that there were two buses parked outside the hospital in the road nearby where Holmes would fall; the fact that Watson was knocked down by a cyclist after Holmes had jumped; and the fact that the entourage which surrounds Holmes’ body on the ground appears with suspicious speed.
Emily’s theory is as follows:–
Sherlock knew what Moriarty was planning, and that Moriarty would want him to jump from the building, a long time before Sherlock climbed to the roof. Sherlock then invented the supposed shooting of Mrs Hudson to get Watson out of the area while he engineered the means to fake his own death.
Meanwhile, Holmes uses either Mycroft or homeless people to make it so that he can jump from the building and be caught by a net or mattress, some kind of cushioning system. This may have involved the two buses as anchors perhaps, or for deployment. The buses would also have been useful to shield the apparatus from the eyes of the public; possibly leading Holmes to be so picky about where Watson stood when they were talking on the phone together.
Holmes would have then jumped, and would have been caught by the system beneath. As Watson approaches, he is knocked down by a cyclist. While he is dazed, the homeless network/Mycroft’s people take Holmes and lay him on the pavement, throw some fake blood over him and spirit away the apparatus which cushioned his fall. The entourage which attended to Holmes arrived far too quickly to be by-standers, meaning that the ‘audience’ were placed there on purpose.
Homles is then taken somewhere to hide. This plan means that he is able to jump from the building so that his friends will live, at the same time as staying alive himself and making Watson and others think that he is dead.
Comment if you have any thoughts, or speculations as to why Holmes declared that he had invented Moriarty before he jumped.