Most of what I know about complex science comes from comic books, so forgive me if my understanding of quantum mechanics is a little off. But, I think it can mean that particles can exist in two states simultaneously. 'The Amazing Spider-Man 2,' a film loaded with such half-understood notions of difficult scientific concepts, is a quantum movie. It manages to be both awful and entertaining, frequently at the same exact time. The script is ludicrous, even by summer blockbuster standards. The characters behave irrationally and without motivation and the story makes lengthy, frequent pit stops into dull backstory. But, for every moment of tedium and confusion there is a tiny explosion of joy. Director Marc Webb just barely ties this collision of half-baked ideas together in a sticky Spidey bow.