Last night, I watched a fabulous short film called "The Love Competition" by Brett Hoff. I saw it on Wholphin (which I subscribe to and love), but the piece can be viewed *right now* on Vimeo: http://vimeo.com/33698394, and I recommend you check it out asap.
The premise? A team of Stanford neuroscientists scans the brains of a half-dozen or so competitors (aged 10-75) as they love as hard as they can for five minutes. MRI scans reveal the winners! The brain reveals all, perhaps.