I read the comment "Def made for young teenage boy demographic. You're better than this Tenacious D!" and had to comment !

F*ck that !!! I love metal and we are boys. I'm 45 years old and people don't understand why I look this young. It's because I feel young.
Tenacious D you are spot on and this film Rocks BIG time... This movie ROCKS and that riff was f*cking asome. The proof of that is that your friends (I mean F*ck just look at the cast) wanted to make this film.

I'm a DIO and Rainbow fan (Ronnie R.I.P.) and you have the sound of ROCK !!! This film is the best gift for a DIO fan.

You must have had so much fun making it... Wish I could have seen Dave Grohl do take after take, because you guys just didn't want to tell him take one was perfect and the camera stopped filming 30 minutes ago. It's al about having fun and loving what you do.

Metal can not be defeated
check out the Heavy Metal Monk. Yep, this guy is a real monk and has a long white beard.
Don't forget that most music we loved as kids originated in the 70s.

Check out Linzey Rae - Screaming Vocal Tutorial With Mom. It's fun right... Rockers are nice people with humor !!!
The negative ones end up claiming it was a phase. Rock is the kind of music that can bring peace between different alien species, because they have something in common. And maybe Rock already saved our planet from being destroyed because they wanted to hear the end of that guitar solo (just enough to change their mind destroying our planet).

Negative NON research comment by Mark Kermode - Tenacious D in the Pick of Destiny...
behind the scenes The Making of Tenacious D | The Pick of Destiny