In Knock Knock, the sins of the fathers are visited on the children, as a disfigured maniac slaughters the kids of those accidentally responsible for his terrible injuries.
When a slasher features an excess of mean spirited gore and plenty of curvaceous beauties (including some topless nudity during the obligatory shower scene), I can usually make allowances for a derivative plot and dreadful performances, but so abysmal is the camera-work and editing, mostly during Knock Knock's all important death scenes, that I can find little forgiveness in my heart on this occasion. With horrible 'wobbly cam' and that annoying flickering effect that accompanies rapid cuts in so many contemporary horror films, I soon found my patience wearing thin.
It's a shame, because if writer/director Joseph Ariola had just kept it simple, rather than trying to be 'stylish', his film could have been a whole lot more enjoyable—a good old-fashioned, unpretentious stalk 'n' slash that doesn't wimp out on the splatter (victims are repeatedly stabbed, burnt, eviscerated and dismembered). As it stands, there's a good chance that the erratic execution of the film's kills will induce a seizure, which isn't really what we want, is it?
