Bruce Banner, the Incredible Hulk's alter-ego, suffers from terrible post-traumatic stress disorder in the new Hulk movie. There are a few scenes of Banner freaking out in the bathtub as he remembers the violence of the military's latest attempt to capture him. You can't even get close to Bruce Banner (Edward Norton), because he's so wound up with his trauma. Flashes of guns and fists. But in the end, the movie suggests, Bruce's PTSD is a by-product of his struggle to hold onto his humanity, to avoid becoming the ultimate killing machine. Spoilers ahead.
If Iron Man was about America's power overseas — specifically in Afghanistan, where much of the movie takes place — then the Incredible Hulk is about what happens to our soldiers when they come home. It's about the impossibility of transforming young men into "super-soldiers" and then expecting them to blend back in. Banner is on a hair-trigger not just because he's pissed off, but because he's traumatized by being under attack and on the run — and because military-sponsored experiments have made him fit only for battle. The whole movie is about Banner's rejection of his fighting-machine identity, and his fight against Emil Blonsky (Tim Roth), who embraces that same identity.