I think the only surprises might be from interviews with various people commenting on Baker. The person making the documentary did do quite a lot of work it seems. I talked to someone who saw it months ago. He liked it, but I didn't get many details. He was the one who emphasized that he liked the interviews which intersperse the documentary. (I think mostly from drummers, but from other musicians, too. I'm not sure.) I've seen that clip with Ginger breaking the guy's nose with a cane. I have to say it clearly does make Ginger Baker look like quite a disturbed person.