Pearl Jam's "Porch" during the last minute with the arpeggiated guitar frantically struggling to keep up with Eddie's growl. And Radiohead's "Exit Music (For A Film)" because it's the most haunting song I've ever heard.

I live in Mexico and also saw it about six months ago. My kids, 7 and 3yo, were unfamiliar with the story, but Out looked interesting to the missus and me. Totally agree that it's worth a watch (or three); it's really beautifully made and heart-rending. And the kids LOVED it, so it's plenty accessible.