Taboo breakers. Films that pushed boundaries, overstepped the line or simply went all out to shock. Whether through their advertising or their content these are the movies that used shock tactics to sell tickets.Film critic and journalist Calum Waddell subjects 18 films to analysis and puts them into historical perspective, whilst discussing the films and their impact with those involved in their production. Each of these movies, some good, some bad and some very, very bad indeed, carried with them a certain marketing savvy and air of controversy which ensures that they will stay in the mind long after the screen goes blank.