Typically, when one looks at their grandpa, they’d imagine him listening to classical, jazz, doo wop, or maybe a bit of Johnny Cash. Lets face it, if they could still drive, you’d imagine them listening to static on an AM radio station or bopping their head along to some Frankie Valli. However, after a recent Foo Fighters music video, elders can be full of surprises. The coolest grandfather alive can be seen in a video below who is headbanging along to Metallica’s “For Whom The Bell Tolls.’

Enjoy:

[MetalSucks, via The Chive]