This is an appallingly inept film made by a production team who did not respect or even understand the source novel. It is a book about hate and poverty and pain. The whole point of the novel is that the mother corrupts the boy into being as slyly evil as she is. The director plays this as comedy! complete with dropped trouser gags, crass blue lighting, and ubiquitous crashes of thunder to complete the farce. The whole is completely miscast by a team of poor players who have the subtlety of sledgehammers. The film is full of crass moments which aren't in the book, such as the dreadful wink-wink wraparound. The ending has been changed! and made happy! Watch instead the 1971 version, which is true to the spirit and the themes of the original novel, with perfect settings and a magnificent cast, playing with the right amount of seething resentment and ripening rage. The only flaw with the 1971 film is that it is too short.
Review of Viper in the Fist
