I'm no Sherlock Holmes fan either, but I do like to see previews of movies just to see what they're going to be like. But I did like the part where Sherlock had the small hammer and tried to hit the big guy who had a bigger one! Typical Robert Downey Jr!
BTW, for those of you wondering what that butt-kicking music was from 1:04 to the end? It's called Unstoppable by E.S. Posthumus