 The British Cinema version was cut to remove the drill sequence. This version  was released on video in the UK before 1984, after which all videos were  required to be submitted to the British Board of Film Classification.  When  it was finally given a video certificate by the BBFC, further cuts were made  to remove the intestinal vomit scene, and the brain squashing scenes.  The UK  video has a total of 2m 21s of cuts.