My current theory is that he jumped into that truck with rubbish bags and climbed out for Watson to find him. The cyclist was set up by Mycroft to prevent Watson to get too close too soon. But there are plenty of arguments against that theory too...

Yeah, but didn't we see Sherlock hit the pavement? I'll have to watch the scene again to see if our view of him falling is obscured at any point. I do agree with you about the cyclist being a diversion as he seemed to be a little too conveniently placed. *g*

(although I love the "he minimized himself and then crawled into a robotic replica of himself a la Doctor Who" theory. *g*)

Well, when you've eliminated the impossible... *g* Right now, it really does seems like the only possible theory, but I know there will be some brilliant explanation for how the trick was done.