I didn't find any tab, but by listening to it, I think what he does is some pull offs to the high E string that he uses as a drone (or pedal tone) while he does crazy hammer ons on the strings. Goes something like it (I only listened to it once, so this ISN'T an actual transciption, only the technique I think I have heard)

-0-10-12-0-12-15-0-15-17-0----
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I might be wrong, but this technique almost sounds like there's one guitarist playing the E, while the other solos.