Seems the Foo Fighters have been working on a documentary film. It's a two-parter about “the rewards and challenges of dedicating one’s life to playing and mastering a musical instrument" called Play.
Basically, it is going to be a behind-the-scenes look at Dave performing a 23-minute song and playing seven different instruments during the performance.
It should be out next Friday (the 10th). Here's a little preview...