How many times in your life have you snuck up on someone and scared them? Three, maybe four times? The Lazarus Effect is the kind of horror movie where people do that constantly. It’s basically their standard greeting; instead of “Hello!” they jump on people from behind, sometimes while wearing pig masks. It doesn’t make much sense, but they’re not doing it because it’s logical — they’re doing it because this is a bargain basement horror film and you take the scares wherever you can get them.