10. The Human Centipede 3: Final SequenceTom Six's trilogy of films based on the revolting concept of the "human centipede" are arguably the most controversial set of horror films since the video nasty era. The 2009 original was a competent body horror, but was followed by the utterly repellent 2011 sequel, which had to be cut before it could receive an 18 certificate from the BBFC. With that legacy in mind, the third and final instalment in the trilogy was released earlier this year, featuring previous stars Dieter Laser and Laurence R Harvey as, respectively, a psychotic prison warden and his timid accountant. It would be wrong to call The Human Centipede 3 a good film, because it isn't, but there's something oddly entertaining about its mixture of horrendously over-the-top comedy and deeply uncomfortable grotesquery. It's not the best film on this list by any stretch of the imagination, but Halloween is perhaps its natural home, as a gross-out movie to challenge a boozed-up group of friends to sit through. Six may be a filmmaker with an over-inflated sense of his own talent and importance, but The Human Centipede 3 is one of his better works, imbued with a sick sense of humour. It could become a cult favourite solely on the basis of Dieter Laser's deranged central performance, which comes across like Nicolas Cage delivering a Frankie Boyle comedy set.