Freedom by Jimi Hendrix
downtune the E string a half step

b = bend string 
h = hammer on

When the bass comes in, a long descension of notes is played.  I think it's the entire 
scale of the song played backwards.  I don't know how to make the scale though.
Something similar to:
G |53----------|
D |--5431------|
A |------31----|
Eb|--------4320|

   1st verse riff    Bridge
G |----------------|---------3-5-|
D |----------------|-1-3-4-5-----|
A |3-1-3-------1-3-|3-3-3-3------|
Eb|------0-2-4-----|-------------|

   chorus intro                chorus riff
G |---------------------------|--------------|
D |----------------------4--2-|--------------|
A |-----3--646-3------3-------|-----3--646-3-|
Eb|0-0-----------0-0----------|0-0-----------|

   2nd/4th verse riff
G |---------------|
D |---------------|
A |--1-3-----13---|
Eb|4-----0-4---40-|

   3rd verse intro      3rd verse riff
G |-------------------|-----------------|
D |-------------1-4-7-|-------------9b-7|
A |---------1-3-------|68---------------|
Eb|0-0--2-4-----------|----7b-----------|