I n this slasher directed by Michael Cummings, AKA Powerman 5000 singer Spider One, Adam Lewis (Brandon Scott) is a screenwriter who spends too much time fretting about what the film reviewers he claims to despise think about his work, and not enough time writing. It’s a little hard initially to get a handle on exactly where this writing really sits: are we meant to believe he’s a misunderstood genius, or are the reviewers, in fact, correct? When Big Baby opens, Adam’s most recent film is being negatively reviewed by a couple of blowhards on a horror podcast, then he later gets grouchy with his all-too patient and supportive girlfriend (Krsy Fox) when she dares to imply he may never win an Academy Award.…