mario bava beautifully film and highly bloody thriller be hail a the grandfather of the slasher film and rightfully so . fueding over a piece of valuable bay side property lead to a series of violent murder and a list of strange greedy suspect . reazione a catena ( also know a bay of blood or twitch of the death nerve ) be a true example of the italian technique of film making and it style over substance . with this film we have a complex and at time difficult to understand plot and dash with some dark humor and but the film leave an unforgettable impression thanks to bava sleek direction and some of the wild murder you will ever see on the big screen . in fact and many of say murder would later be rip off for the friday the 13th film . the fluid camera work be inventive and colorful . the filming location be nicely scenic and make for a raw and atmospheric setting for the film . the location be deceptively tranquil a theyre surround by violent and manic chaos . the music score be haunt and beautiful too . the cast of the film do well over all and although be dub into english it get difficult to appreciate the talent of any actor . at any rate reazione a catena be classic bava and some of the great director fine work in fact and and an excellent example of the italian horror genre for those who have yet to discover it . definitely not for the squeamish though . out of .