Indiewire: Though Hollywood would like to think all of summer is the Silly Season in regards to box office, the truth is, every four years, July takes a slight hit. The Olympics seemed to catch the attention of casual moviegoers this weekend, as prospective smash "The Dark Knight Rises" took a strong second week nosedive of 60%, ruling the roost over a sea of uninspiring options with a still-formidable $64 million. While "The Dark Knight" ruled over summer 2008, only four more '08 releases in that frame sputtered over the $100 million mark. One was inexplicable worldwide smash "Mamma Mia!," but triple digits were just barely reached by "Step Brothers," "The Mummy: Tomb of the Dragon Emperor" and "Tropic Thunder." Judging by this weekend and the remaining summer schedule, the industry looks like will be lucky to halve that number.