The first time Chris Hemsworth auditioned for “Thor,” he didn’t get very far. “I blew my audition, I guess,” he confesses in his new Screen Test. Instead, the producers seemed taken with another Australian, his brother Liam Hemsworth. Eventually, Chris was brought back in, and this time he nailed it. “I came in with a little motivation and maybe frustration that my little brother had gotten further than me,” he says. Plus, he tells of kissing wife Elsa Pataky as Thor.