Looks like Paramount's decision not to screen G.I. Joe for critics might have paid off: The film grossed an estimated $56.2 million at the box office this weekend. That haul was good enough to make it the fourth-highest August opening of all time, falling behind The Bourne Ultimatum ($69.3 million), Rush Hour 2 ($67.4 million), and Signs ($60 million), each of which went on to gross more than $220 million in domestic receipts. [Reuters]