Nightcrawler (out now on download and Blu-Ray) is enthralling because we’re natural born gawkers. We are fascinated by the pain and drama of others, and that fascination is normal, but it can be lead to evil things when someone lacks empathy like Jake Gyllenhaal’s glassy-eyed Lou Bloom. Nightcrawler pushes the boundaries of how comfortable we should feel about our attraction to train wrecks.