Distortion guitar in 2nd chorus plays something like this. It's hard to hear so I'm entirely sure.
W W W
Q E S E E E S E Q E S E E E S E
E E E S E E E S E Q E S E E E S E
Then the verse riff.
Now for the crazy riff.
^ ^ v ^ v ^ ^ v ^
H Q E E E E Q Q E E
