* DarknessInducedAudienceApathy: Given that most of the cast are greedy murderers with few, if any, redeeming qualities, some people [[https://youtu.be/GwV14cKi29w?t=16m5s responded to the film in this manner]].
* VindicatedByHistory: Caused a lot of damage to Mario Bava's career due to its unflinching depictions of carnage. Creator/ChristopherLee reportedly even walked out of the screening disgusted with the violence. But, it's now regarded as providing the blueprint for the 80s SlasherMovie. A lot of its kills have been imitated, ripped off, spoofed and homaged-- most notably by ''Film/FridayThe13thPart2''-- but this one still retains its power to shock.