What's the name of this song-?

http://www.youtube.com/watch?v=gpSKzaq3-cw

It starts at about 0:25. I think it's called "Halls of the Mountain King" or something like that.

Thanks

I used to know what it was called back when i used to watch those old sonic cartoons, but then i forgot.

Peer Gynt, Suite No. 1, Op. 46 - In the Hall of the Moutain King by Edvard Grieg.Samwel_X

Beat me to it :P

I remember studying this piece when I was in 3rd year for Music.