As Arnold gets into the grit of her characters, leading Jackie toward the explosion she and we crave and then beyond, she drops the voyeurism theme almost entirely, a bait-and-switch that doesn't cripple "Red Road" so much as snip off its richest and eeriest thread. The movie trades the paranoia of modern omni-cam culture for a tighter, more personal drama, and while it sticks with you, you feel the missed opportunity like a phantom leg.