"The Fall"
There are so many clues to so many different things, Moffat & Gatiss must be Red Herring fisherman!
Sifting through it all, I finally have settled (for now, lol) on this one.

Sherlock arranged for Molly to get the bits & pieces together, such as blood and a heap of the Homeless Network and a few other things needed.
During the evening/early morning 2 buses arrived at the hospital. Now this isn't a busy street so why 2 buses at the same time? Oddly, 2 buses were still there later when Sherlock & Moriarty first look over the side of the building. These buses could hold quite a few people (homeless ones) and sit waiting for when they get a signal.
From above we can see a large rectangle marked out on the pavement. Beside the bus shelter we see 'something' that is darker in colour than the pavement. We also see those 2 buses.
What I believe is beside the bus shelter (or maybe it's not) and was used is a 'jump blanket' or net, stretched across the rectangle & held by the homeless network people. Once they are off the buses, the buses leave & a laundry/garbage truck pulls up. They grab the blanket/net and take position to catch Sherlock, the blanket is thrown in the truck & it takes off. Sherlock assumes his position & is quickly 'made up' to look dead.

Now back 'up top' Sherlock first 'prepares to jump' and asks for privacy, obviously to get everyone to get into position. But he still has the problem of Moriarty being there. He can't jump yet. He knows from his chat with Moriarty that the guy is really going off the deep end, he just needs a little push. He has already 'fed' his ego with pretending to think the finger tapping was some great code; acting surprised when it's revealed it's not and stumbling through his words to give the notion that he is scared.
Sherlock's mission is to get this ego so inflated that it will explode all by itself. That's the thing about egos and especially insane ones, they eventually self destruct. This one is a little stubborn. Eventually he gets what he plans on though but at what cost? His friends? So he HAS to complete the 'fall'.

No doubt Mycroft or Molly could have been arranged to get rid of Moriarty's body soon afterwards.

There's are a lot of 'but what about ' questions and before I get booted out of here for using up the space, I will leave them but will answer any questions anyone has.
Just think, in a year from now I will read this and say " geez I am stupid!"

There r 3 chalk lines on the floor and 2 people sitting on benches that arnt there after ...... Homeless net work and a soft landing maybe?!!! Xx

Odd question here, as I already believe 'being a hero' is what Sherlock did that he normally doesn't.
Now this may take some thinking/watching and I don't really know why or what it means, but does anyone remember Sherlock ever shaking hands with anyone?
He didn't when accepting the gifts at the start of this episode, and I recall he didn't a few other times previously (I thought "Geez he's an arrogant sod" at the time) but he did with Moriarty at the end.
I don't know if it's anything nor can I recall anyone in the show mentioning it, but it bugs me for some reason.

and with Sebastian of course.

Wrote this late last night on my Blackberry Memo Pad whilst watching Reichenbach on my iPod in bed, lol:

If Sherlock knew enough to prepare for his jump, then he must have known that Moriarty wanted him to kill himself. But then he also would have known that Moriarty must have had some kind of ammunition or incentive to force Sherlock to jump. With the assassins living in Baker Street he would have worked out about their involvement, and as he reeled off the list of names without much hesitation he had obviously previously worked out who the intended targets were - Lestrade sticks out as being the odd one out, Sherlock would have chose Molly ordinarily but Jim doesn't know how close he is to Molly so chose Lestrade.

SO, if Sherlock knew about the assassins, knew how the targets were and how Moriarty was going to use that to force him to jump, then he would also have worked out that Moriarty could call them off if he wanted to. He laughed the first time he stood on the edge because he knew he'd already beaten Moriarty.

He did seem genuinely surprised that the computer code wasn't real, so I think Jim had everyone fooled on that aspect. But he must also have entertained the possibility that Jim might kill himself or fake his own death to force Sherlock to jump. He seemed surprised and shocked when Jim shot himself but then I also think Sherlock beleived he was being watched and listened to, which is why he made that phone call to John and denounced himself as a fake, an unneccesary aspect - if he believed he was truly alone on that rooftop he could have just told John what was happening and then John could have pretended he thought Sherlock was dead and been "in on it" like Molly obviously is. Maybe all the surprise and emotion etc he showed up on that rooftop was all staged for Moriarty and the hidden cameras/mics.

I also think Sherlock set up the Mrs Hudson is dying phone call to get John away from the hospital so he could get up on the rooftop with Jim. That's why he didn't show any emotion - he knew Mrs Hudson was fine.

Phew...it all sounded good last night anyway!

John was sleeping prior to the phone call about Mrs Hudson. That gave Sherlock plenty of time to text someone to make that call.

I found this quote from Steven Moffat just now, it's from January.

Steven Moffat, who wrote the series with Mark Gatiss and Steve Thompson, has said all the clues pointing to how Sherlock survived were in the episode. ‘It’s all set up,’ he said.
In an interview yesterday, he teased fans further by saying: ‘There is a clue everybody’s missed. So many people theorising about Sherlock’s death online – and they missed it!
‘We’ve worked out how Sherlock survives and actually shot part of what really happened. It all makes sense.’


That makes me happy, as it's the premise that I have been working on all along, everything we need to know is in THAT episode.
We must learn to observe better to get our answers.

Something that does occur to me as odd is that Sherlock did not go to the court to hear the verdict. He does not seem surprised when John calls him to tell him that he has been found not guilty. The fact that absolutely no defence evidence was given is also odd. Earlier Sherlock says to John that Moriarty is in prison- after the Tower of London, Bank of England and Pentonville Prison incidents- precisely because that is what he wants. Equally he must be aware that the trial is also what Moriarty wants.

Think like Sherlock, what possible reason would he want to go & sit in that courtroom? He'd be bored, probably mouth off again and get thrown in the lock up !

But really, in Sherlock's eyes, it would serve no useful purpose to sit & watch the verdict.

As for him knowing Moriarty wanted a trial, of course. Moriarty is a criminal mastermind, did that arrest look like a criminal mastermind being foiled?

Remember, think like Sherlock.