Riff 1 
A--4-4------| 
E------4-4--| 

Riff 2 (sounds like a standard triplet rhythm) 
A-------------------------| 
E--4-4-444-------5-5-555--| 

Riff 3 
A------------------------------------------------------| 
E--0-6-5-4---0-6-5-3----000-000-6-5-4--000-000-6-5-3---| 

Riff 4 (after little guitar break) 
A--4-5-5--4-5-5--| 
E----------------| 

First Chorus (spoken) =Riff 1 
Second Chorus (Max) 
E--3----3----3----3----| 

Riff 5 (Solo) 
A------------------------------------|  
E--4--2-5-4--2-5-4--2-5-4--2-5-4-----| many times 

Then I think it's Riff 3 a few times 
Riff 6 (outro) 
E--0-0-0-0-0-0-4-4-4--0-0-0-0-0-0-3-3-3---| over and over 
  
Don't forget to laugh, scream, and just go friggin' balistic!!!