Rarely, but sometimes, a movie can have an actual physical effect on you. It gets under your defenses and sidesteps the "it's only a movie" reflex and creates a visceral feeling that might as well be real. "Open Water" had that effect on me. So did "Touching the Void," the mountain climbing movie from earlier in 2004. After both movies were over, I felt the need to go outside and walk in the sunshine and try to cheer myself up.
See suntimes.comfor full review.