Main Riff
e-----------------------------------------------------------------
B--5b---3--------------------------5b---3-----3-------------------
G---------5-4-2-0-----------7--5----------5-4---5----------7--5---
D---------------------------7--5---------------------------7--5---
A---------------------0-3/5-5--3---------------------0-3/5-5--3---
E-----------------------------------------------------------------


Repeat that riff several times and play on different octaves.


Main Riff (Higher Octave)
e--12b---10----------------------------12b---10-------10------------------
B-----------13-12-10-8--------------------------13-12----13---------------
G-------------------------------7--5--------------------------------7--5--
D-------------------------------7--5--------------------------------7--5--
A-------------------------0-3/5-5--3--------------------------0-3/5-5--3--
E-------------------------------------------------------------------------


Main Riff (Another Octave)
e------------------------------------------------------------------
B------------------------------------------------------------------
G--9b---7------------------7--5----9b---7------7-------------7--5--
D---------10-9-7-5---------7--5-----------10-9---10----------7--5--
A--------------------0-3/5-5--3------------------------0-3/5-5--3--
E------------------------------------------------------------------


Then Tim goes to this riff:
e------------------------------3--1p0--0--0--0----------------------
B-----------0--------3--5--3b---------------------------------------
G-----2-----------5-----0---------------------------------------3---
D--2-----2-----2------------------------------------------3--5------
A-----0---------------------------0-------------0--0h3h5------------
E-------------------------------------------------------------------


Alternate Riff:
e-------------------------------------1--
B-----------0--------3--5--3/1--1--0--1--
G-----2-----------5-----0-------------4-- Strum that last F then
D--2-----2-----2----------------------3-- go back to the main riff
A-----0-------------------------------3--
E-------------------------------------1--


Back to main riff.