According to imdb;
The film had a troubled production. When director
William Lustig's rough cut came in at only 51 minutes, he refused to shoot the additional scenes the producers wanted and quit the project; the balance of the picture was directed by co-producer
Joel Soisson. Prior to Blue Underground's DVD and Blu-ray release of the movie in 2013, Lustig was the film's credited director. However, the Blue Underground version is credited to the Director's Guild of America pseudonym
Alan Smithee.
I'd love to see the 51 minute 'Director's Cut'
