This is the intro as in the VERY BEGINNING OF THE SONG. This is not the intro/solo
that everybody labels as intro. This is the first riff you hear at the very start
of the song.

E-----------------------------------------------------------0-----|
B---------------------------------------3---------------------3---|
G------6h7p6---4------4------------0-----0-------------0----------|
D-----------------5---------------0---0--------0h2p0--0---0-------|
A----0-------0-------5-------0h2p0------------3-------------------|
E-------------------------3---------------------------------------|
Cont.

E------2h3p2----0---|                
B------------3-----3|
G-------------------|
D----0--------------|
A-------------------|
E-------------------|

Other times at the end just plays around with hammering on 2 and 3 and stuff like that.