Okay, I never met my grandfathers, but I'd like to think they were cool as s***, like this guy. Not only was he a Navy pilot, he was also program manager for the instrument made to repair the Hubble Space Telescope! And now, he's also a karaoke singer who loves to sing Drowning Pool's "Bodies"!

I want him for my grandpa!

Not only does this dude sing this for real at karaoke night, but he took this song and his energy to America's Got Talent to freak the living s*** out of Simon Cowell, and everyone in the crowd! Check out the exclusive AOL video.

Admittedly, he's not a good singer by any stretch of the imagination, but he's 82, and belting out freaking "Bodies"! That gets my vote for one of the coolest things out there!

Much kudos to John Hetlinger, for staying young and cool. I hope he's giving lessons, a lot of us need them!