There's rockin out to your favorite band, and then there's this guy. Not to mention, he might be your grandpa!

This is either an old man who doesn't know what he's listening to, and possibly senile. Or an old man that knows EXACTLY what he's listening to, and wants everyone to know it!

I can only hope that one day I'm able to do this, and have some punk kids look at me like I'm crazy. GET OFF MY LAWN!

Metallica should definitely find this guy, and invite him to one of their shows.

One last thing...if you're going to video something on your phone, turn it on it's side so that we can all enjoy it in full frame.