Could 500 Days of Summer be the first film in which Joseph Gordon-Levitt doesn’t give a twitchy, mannered, off-tempo performance and actually passes for semi-normal? Are we witnessing a temporary moratorium on affected humanoid actorishness? I for one am disappointed. I go to JGL movies to experience irritation and annoyance to such a degree that I start twitching and convulsing and finally walk out. I missed 500 Days of Summer at Sundance, but I have a feeling…no, a belief I’ll probably make it to the end.