It’s literally impossible to recommend “Terrifier 3,” a horror movie so nasty and nightmarish that it’s bound to be an endurance test for even genre buffs with the most hardened nerves and strong stomachs. But it’s also easy to admire “Terrifier 3” and what writer/director Damien Leone has accomplished. Many horror movies aim to be transgressive, to shock and disgust, but here’s one that actually manages to pull it off. It pushes your buttons with such deadly force that your inner machinery breaks –– you cannot believe what you’re seeing. One can never accuse this movie, or this franchise, of taking the easy path or softening its edges to make for a safer, more palatable experience. Here’s a horror movie that declares itself to be dangerous, and actually delivers on the promise.