Watch the Breakdown #1 online guitar lesson by Stu Hamm from Stu Hamm U: Tap Bass
The first part is similar to the opening of "Sexually Active", hey - I wrote them both! The lick is a basic doubling of root-fifth, fifth-root-fifths with the doubled note in the middle giving it that distinct sound.
This lick leads into a series of dominant 7th chords. We finish by going up the neck with our quintuplet power chords and descend with a nifty diminished pattern.