Sherlock Holmes (2009) - 6 questions

Question: Even though I have seen the movie five times, I still don't understand Holmes when he is explaining how Lord Blackwood survived the hanging, without any pulse. Could someone explain it to me?

Answer: Blackwood took a chemical toxin that slowed the body's functions down to a very low level, far enough that he would appear dead even to the trained examiner. Watson pronounced him dead, then his body was placed within the prepared tomb. At some point after that he returned to normal function as the toxin wore off.

Question: In the mistakes section it comments that Jude Law is wearing a hearing aid in one scene. Does anyone know anything about this? I couldn't find any reference to him having hearing loss online. Is it possible that it is actually just an earpiece?

Answer: Jude Law's hearing is fine, he was wearing the hearing piece so the director can tell him where to stand while they are filming.

Question: What's the name of the song playing in the background when Holmes and Watson fight with Dredger and the other two men in Reordan's flat? I looked everywhere, but I can't find it: it's not on the official soundtrack, either. Also, in the same scene, Watson starts off battling two men while Holmes takes Dredger, but later there is only one fighting with Watson. Where is he?

Answer: Apparently the song is sort of a Hans Zimmer take on 'Johnnie Cope.' And Watson dispatches the first 'potato' by throwing his coat around the man's neck and beating him over the head with a large metal bowl.

Question: Outside Madison and Haig, a gypsy corners our dynamic duo and tells Watson his future. I figured out that Holmes was setting Watson up when I saw her in the crowd at the start of the 'crowded alley' scene, moving quickly to get into position outside Madison and Haig. But how does Watson realise that Holmes has set him up? He never saw the gypsy at the start, and all Holmes says at the time is 'Doilies'. Am I just being really slow?

Answer: Because she just happens to share Holmes' opinions, and also because of Holmes' extremely sarcastic reactions to her predictions.

Question: I saw a trailer for the film in which the scene in the hotel (between Holmes and Irene Adler) appears to be different - she's wearing a short black and red outfit instead of the peach coloured one, and she physically knocks him out instead of drugging him (she first tries to use her hairclip as a weapon). Why was this changed, and is it on the DVD?

Answer: Often times scenes that appear in a trailer don't appear in the final movie. The trailers are sometimes created months in advance of the release of the movie, and sometimes scenes are removed for pacing reasons or to reduce the overall runtime, or are only intended for the trailer. Occasionally those scenes might be put back into a movie on its DVD/Blu-ray release, or might be included in a 'deleted scenes' section, or often are simply omitted altogether.

Question: So what tricks does Blackwood use to make the girl try to kill herself at the beginning? I don't get that part. Thanks.

Answer: While it's never stated explicitly, drugs and hypnotic suggestion are most likely.