VERSE
E------------------------------------|
B------------------------------------|
G------------------------------------|
D---------5-5-5-5---------5-5-5-5----|
A--5-5-5--7-7-7-7--8-8-8--7-7-7-7----|
E--7-7-7-----------6-6-6-------------|
[ Tab from: http://www.guitaretab.com/u/under-a-nightmare/61262.html ]
CHORUS
E-----------------------------|
B-----------------------------|
G-----------------------------|
D-----------------------------|goes back to verse after 1st chorus
A-7-7-7--8-8-8--9-9-9-9-------|
E-5-5-5--6-6-6--7-7-7-7-------|
and after the 2nd chorus it has another little riff that goes somethin like....
E----------------------------|
B----------------------------|
G----------------------------|
D----------------------------|
A-5--7--7-7-7----5/-7--7-7-7-| then after this goes back to the verse
E-3/-5--5-5-5----3/-5--5-5-5-|