Someone must've been on crack whilst making this.
I like the difficulty name: Ultra Extreme. It's an understatement.
One of the bonus tracks from the recent GuitarFreaks & DrumMania V6 Official Soundtrack.
From DT's new album Black Clouds and Silver Linings. This double bass in this song is incredibly difficult. It constantly shifts between 8th beats, 8th beat triplets, 16th and 16th beat triplets. Check out the blast beat near the end of the song!