Because you sped through the level too fast to hear it the first time.
Video The Hobbit Meets MetalJanuary 01, 2013
There and rock again.
Video Heavy Metal PacmanJanuary 19, 2012
There's nothing more metal than EATING ghosts.
Video Sonic Meets MetalSeptember 23, 2011
The other kind of Metal Sonic.
So metal he could be a badnik.