This is one of the things most theories differ on. Some people think Sherlock was not who jumped from the roof so... what do you think?
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Waiting for a crazy man in a blue box to fall from the sky...But the thing is, we've taken away all the things that can possibly have happened, so I suppose the only thing that's left, even though it seems really weird, must be the thing that did happen, in fact. (Miss Marple)