Tantalus wrote:

Note to self: British word for "stretcher" is, apparently, "trolley". I won't show my ignorance by revealing how many of the posts on this thread I had to read before I realised Sherlock hadn't hopped on a streetcar somewhere...

And don't forget "gurney" 

I enjoy the British English in Sherlock very much - and had a good laugh imagining loading a patient on a trolley down under, which, really, couldn't be done 

Oh no, no, I just don't think they would actually put Benedict onto the trolley, all covered with blood, then suddenly stop filming and do the 'rolling the trolley into the hospital' scene later, when Benedict, for some mystical reason, has no time. And even if they did, guys, we are talking abot Sherlock, they even split the end of season one and the beginning of season two when they filmed, they did the season 2 part the next day and everything looked the same! Don't you think they'd be a bit more careful about that? They would at least let the double spread his arms the way Benedict did. Or paint his face red.
Moffat and Gatiss /want/ us to watch closely and since this is not THE most important clue that suddenly makes everything obvious it isn't like... unfair to make this visible only if you watch the episode in slow-mo . Including 'exclusive' clues only the people who really observe and not just see discover would, in my opinion, be exactly the thing they'd do.
This also proves that Sherlock does not do a body swap with Moriarty's corpse or whatever people say, since we see Benedict/Sherlock lying on the floor, so if anyone would go like 'Ahaha, obvious, body swap blabla' they could be all 'Ehehehe MOFFTISS'D, you obviously saw but did not observe.'
My English is getting awfully messy now, so I'll stop.
I think this is a clue! :'D