recommended motivational running movie to watch for coming marathon?

Does anyone have a recommended motivational running movie to watch for fun before an upcoming marathon ? ... especially with a barefoot/minimalist bent to the story/athlete

I have watched all the movies on those top 10 or top 25 lists for running movie, seen the recent tarahumara movie, etc.

I'm going to download the Run Free Caballo Blanco movie ... but does anyone know why it is rated as "mature"? ... since I have kids of all ages. :)

... but is there another one(s) you'd recommend? ... ideally a rental from iTunes or it can be seen on vimeo or youtube ... shipping to the Islands here isn't the best option.

Thanks for your help!
 
i saw caballo's movie. they show them recovering his body. graphic if you weren't expecting it. sad if you knew what was about to happen.

"Run Fat Boy Run" with Simon Pegg.
 
migangelo & skedaddle thanks for your ideas!