Smoke on the Water (Deep Purple)
                       Main Riff
1/---------------------------------------                    
2/---------------------------------------                    
3/---------------------------------------                    
4/-2-5-7----2-5-9-5----2-5-7----5-2       
5/-2-5-7----2-5-7-5----2-5-7----5-2                   
6/-0-3-5----0-3-7-3----0-3-5----3-0

                      OR
1/--------------------------------------
2/--------------------------------------
3/-----2--------3----------2------
4/-2-5-2----2-5-3-5----2-5-2---5-2
5/-2-5-0----2-5-1-5----2-5-0---5-2
6/-0-3------0-3---3----0-3-----3-0

Mr. Jack (System of a Down)
          
 Chorus Riff                Verse Riff
1/---------------------------------------------
2/---------------------------------------------
3/---------------------------------------------
4/-0—7—3-8-7-8-7-----------------------
5/-0—7—3-8-7-8-7-----------------------
6/-0—7—3-8-7-8-7—0—7—3-8-7-8-7
 (When he sings “at our heads” for the last time you play the chorus riff fast)

St. Anger (Metallica)

Main Riff
1/-------------------------------------------------
2/-------------------------------------------------
3/-------------------------------------------------
4/-------------------------------------------------
5/----------------------------------------1-1-1-1
6/-0-2-1-0-2-1-0-2-1-0-2-1-0-2-1-0---------

This isn’t all I Know but this all I fell like doing today