(.)palm mute.
(~)bend string.
(*) pinch hermonics.
(!)scilent the strings.
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-------------------------------------------------------------------| x3
--3-2------------6-5------------3-2------------6-5-3-2-3-2---------|
--1-0--00000000--4-3--00000000--1-0--00000000--4-3-1-0-1-0-00000000|
       ........       ........       ........              ........

after playing that riff 3 times do a pinch harmonic and a bend on the 3rd fret.   then 
tune down to drop D and play....
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-0!-0-0-1-1-1-0!-0!-0-0-4-4-1-0-1-0!-|
-0!-0-0-1-1-1-0!-0!-0-0-4-4-1-0-1-0!-|