to add to that....
Sherlock begins planning this the night before. He picks the meeting place. He gets Molly to help him fake his death ect. there is a chalked out line where the truck needs to be parked. you can see the truck only briefly before it pulls up and away.
There is a scene where Sherlock is bouncing a black rubber ball. Magicians use this to cut off circulation and hide pulse by holding it under their armpit. this is how Sherlock fools the people who check his pulse.
^read that from an interview with the director of the series mind=blewn