Tom: G

E|----------------0---------------0--------|
B|--------7--7--7-7-------7--7--7-7--------|
G|--------4--5--7-7-------4-/5--7-7--------|
D|--------0--0--0-0-------0--0--0-0--------|
A|-----------------------------------------|
E|-----------------------------------------|
                 ^  quick strum  ^

2nd: Then move pinky finger up to the 8th fret
     on the B/2nd string and leave it there for
     the second part of the main riff, & repeat
     alternate pickin' & struming technique.

E|----------------0---------------0--------|
B|--------8--8--8-8-------8--8--8-8--------|
G|--------4--5--7-7-------4-/5--7-7--------|
D|--------0--0--0-0-------0--0--0-0--------|
A|-----------------------------------------|
E|-----------------------------------------|
                 ^  quick strum  ^

Bridge:
Am   Bm   G (x2)
Am   Bm   Am (hold)   G

E|---5---7---3---|
B|---5---7---3---|
G|---5---7---4---|
D|---7---9---5---|
A|---7---9---5---|
E|---5---7---3---|
    Am  Bm  G