I LOVE this! If you've ever paid attention, many great guitar and violin players make some wicked faces while they play. I've always been fascinated by that.
He did another to the William Tell Overture, but I didn't like it as much. However, this comment was posted on that one and it touched me:
It's the kind of silly things we used to do with my father when we were kids. I made this video for my father 60th birthday, and I decided to put it online so I could show my love to him by looking like a perfect idiot to the world.