Foo Fighters? SCREAMO? PREVIOUSLY UNREALEASED TRACK?
i've gotta tab this one.....

(STANDARD TUNING, WICKED HEAVY DISTORTION)

~ = vibrato
\ = slide down
/ = slide up
X = KILLSWITCH ON (NOT HARMONIC)

Main riff:

killswitch is used in the intro only between each of the chords below. in the verse it 
not used at all. also the intro opens up with a slide down the neck from the 18th fret.
(0:08)
      X X X X X X
e:----------------------------------------|
B:----------------------------------------| intro:
G:----------------------------17~---------| 2 times w/ killswitch
D:---4-4-4-4-4-4-2------------------------| verse:
A:---4-4-4-4-4-4-2------------------------| 10 times w/out
E:-0-2-2-2-2-2-2-0---18~-19~--------------|


Chorus:
(0:44)
e:-------------------------------------------------------|
B:-------------------------------------------------------|
G:-----------------------------------7-7-7-7-10-10-10-10-|
D:--4-4-4-4-3-3-3-3-2-2-2-2-3-3-3-3--7-7-7-7-10-10-10-10-|   x2
A:--4-4-4-4-3-3-3-3-2-2-2-2-3-3-3-3--5-5-5-5-8--8--8--8--|
E:--2-2-2-2-1-1-1-1-0-0-0-0-1-1-1-1----------------------|

repeat verse and chorus

Bridge:
not EXACTLY sure about this riff, but it sounds close.

e:-----------------(Repeat section below accordingly)----------------|
B:-------------------------------------------------------------------|
G:----------------------2-----3-----4-----5--------------------------|
D:--4-------------------2---4-3---4-4---4-5----4---------------------|
A:--4-(let ring w/-lots-0---4-1---4-2---4-3----4--(let ring again-w/-|
E:--2----of feedback)-----0-2---0-2---0-2----0-2---lots of feedback)-|

repeat intro, verse, and chorus

end last chorus with

e:-----------------|
B:-----------------|
G:-----------------|
D:--4-4-4-4-4-4-4--|
A:--4-4-4-4-4-4-4--|
E:--2-2-2-2-2-2-2--|

and there you have it. i hope this helps even though there's no easy way to immitate the 
feedback drowned in heavy distortion and the insanity in the bridge.
anyway, ENJOY!!!