This guitar exercise uses a reverse gallop rhythm (two 16th notes and an 8th note), all 16th notes are palm-muted and played on the low E string, the 8th notes are not muted and played on the A string, and you climb up through the key of Fm a full octave.
Here is the Guitar Pro 6 tab for this lesson:
HEY!!! Does Your Rhythm SUCK!?