Give J.J. Abrams credit for stones the size of bowling balls, because he practically gift-wraps the pike on which his science-fiction thriller 'Super 8' could be skewered. Early in the film, aspiring middle-school filmmaker Charles (Riley Griffiths) explains to his pal, Joe Lamb (Joel Courtney), why he has added new scenes to the zombie movie they're shooting with Charles' Super-8 camera. It can't be just about the creatures, Charles quotes from the screenwriting books he's been brushing up on; you have to care about the characters, so that you want them to live. Grade: B.