There's a big division out there as to whether Jack Black is a waste of skin or genius incarnate. I fall closer to the latter camp.
Here are a couple of early incarnations. First, his appearance in a 1982 video game ad.
And here he is with John Cusack and Todd Louiso, his costars and coworkers in the High Fidelity record shop. This clip comes not from the movie or DVD extras, but from the movie's website; it's the three of them naming their top five songs to make love to.
I'm thinking Jack deviates a bit from the script at the end, which may account for it being the best part.