“Scared Shitless” (*1/2 out of four). (Yes that’s the actual title). Pretty dumb horror comedy about a plumber and his son (Steven Ogg and Daniel Doheny) who find they have their hands full when a mutant creature escapes into the sewage lines of an apartment building and starts mauling residents. Throwback to camp Roger Corman isn’t quite as awful as it sounds but not funny or scary (or even entertaining).