Superhero sequel "Thor: The Dark World," starring Chris Hemsworth as the god of thunder, dominates U.S. and Canadian box office charts for a second weekend, hauling in $38.4 million, according to studio estimates.br br It's not all smooth sailing for the superhuman in critics' eyes, though. Recently, Time magazine wrote, "The clutter makes your head feel like it's about to explode - and not in a good way, with wonders upon wonders. Instead it seems like arcana that might show up on the midterm final: the next Marvel movie."br br But there's some lighter fare at the box office, too. Just in time for the holiday season, "The Best Man Holiday," a sequel to the 1999 film "The Best Man," was popular among moviegoers, earning $30.6 million in its weekend debut.