The mystifying if not ridiculous success of Michael Bay and Marcus Nispel‘s Friday the 13th — $20 million yesterday, estimated to bring in over $50 million over the four-day President’s Day holiday — at least underlines the old truism about the movie business being recession- or depression-proof. Or that it tends to be, certainly, when there’s something playing that people unencumbered by taste are looking to see. A good thing, that. The sexual metaphor of slasher movies translates so fully. The dumbest people in the world get it, and that’s fine because every so often they need to feel they’re in on the joke.