If there's any rule-of-thumb regarding high-concept movies, it's that their appeal – and, oftentimes, their plots – can be succinctly described on the fingers of one hand: “violent Nanjiani/Bautista action comedy,” for example, or “killer alligators in a hurricane.” In effect, those respective precis tell you everything you need to know about Michael Dowse's Stuber and Alexandre Aja's Crawl – except, perhaps, that both films are even more entertaining than those grabby five-word descriptions might suggest. Not a lot more, mind you … but entertaining enough, during my recent double-feature, to make me not regret the collective three hours spent in their high-concept company.