Finger Nubbing

Finger nubbing is a tapping techinque made famous by buckethead, particulary in his song Jordan. This involves tapping on with 2, 3 or 4 fingers on the all the strings which results in a fast, robotic like sound.
To start we'l use 2 fingers, I usually mainly use 3 as 4 can be quite tricky and my pinky isnt my strongest finger. Make sure your amp has soke distortion but not too much so it's buzzing and have your switch set to the neck position.
Were going to start on the low E string, it's easier to tap on the lwoer strings but to by tapping on the thicker strings it helps you hear your tapping clearer and lets you know if your performing right. When finger nubbing your going to go from your pinky, finger, to your ring finger, to your middle finger and then your index finger, since were using 2 fingers when tapping we go from middle finger to index finger. Same goes to your frettting hand:
Diagram;Fretting hand= fi-index,fm=middle,fr=ring,fp=pinky
Tapping hand= i=index,m=middle,r=ring,p=pinky

E------------------------------------------------------------------
A------------------------------------------------------------------
D------------------------------------------------------------------
G------------------------------------------------------------------
B------------------------------------------------------------------
E------------10p16------9p15---------------------------------------
fm m fi i

What were going to do hear is, place our fretting hand over the 10th fret, then with your tapping hand, tap the 16th fret and pull off to the 10th.
The with your fretting hand index finger over the 9th fret, tap the 15th fret with your tapping hand.
Make sure you tap the 16th fret with your middle finger, then tap the 15th with your fretting hand, keep practising and build up speed. Try these :

E-------------------------------------------------------------10p16--9p15
B---------------------------------------------------10p16--9p15-----------
G---------------------------------------10p16--9p15-----------------------
D--------------------------10p16--9p15------------------------------------
A-------------10p16--9p15-------------------------------------------------
E10p16--9p15--------------------------------------------------------------

And this:

E---------------------------------------------------2p13-3p12------
A-----------------------------------------2p13-3p12----------------
D-------------------------------2p13-3p12--------------------------
G---------------------2p13-3p12------------------------------------
B-----------2p13-3p12----------------------------------------------
E-2p13-3p12--------------------------------------------------------

Experiment on different strings, making sure you tap middle then index, the same with the fretting hand, don't forget to jsut hold down the lower string with fretting hand before the next string along.
Now lets try the same but with 3 fingers, we'l do the exact same thing as before expcet this time were going to add a fret, this time were going to go ring, middle then index, making sure you tap the string and pull off clearly.

E------------------------------------------------------------------
A------------------------------------------------------------------
D------------------------------------------------------------------
G------------------------------------------------------------------
B------------------------------------------------------------------
E------------10p16------9p15----8p14-------------------------------
fr r fm m fi i

Now try these:

E---------------------------------------------------------------------------
A----------------------------------------------------------------10p16-9p15
D------------------------------------------------10p16-9p15-8p14------------
G--------------------------------10p16-9p15-8p14----------------------------
B----------------10p16-9p15-8p14--------------------------------------------
E-10p16-9p15-8p14-----------------------------------------------------------


E--------10p16-9p15-8p14-------------------------------------------
A--8p14------------------------------------------------------------
D------------------------------------------------------------------
G------------------------------------------------------------------
B------------------------------------------------------------------
E------------------------------------------------------------------

For 4 fingers simply add your pinky on both hands and an extra fret, although I suggest sticking to 2 or 3 fingers.
Another buckethead finger nubbing trick is to use 2 fingers on one string, tap it and slide up the fretbroad.

E------------------------------------------------------------------
A-------6p1112-----------------------------------------------------
D------------------------------------------------------------------
G------------------------------------------------------------------
B------------------------------------------------------------------
E------------------------------------------------------------------
>>>>>>>>>>>>>>>>>>>>>>>>>>>>slide to 12

What this means is hold the 6th fret on the B string, then tap the same string at the 11th and 12th fret with your middle then index finger repeatadly, then slide up to the 12th fret, as you move to the 7th fret with your fretting hand, your tapping hand moves up a fret and so on and so on.
Important tips:
1. Strike the strings hard and cleany, making sure the pull off is sounded.
2. Use the palm of your tapping hand to mute unwanted string noise, try to tap with your hand so it's palm is slightly covering the strings near the bridge so you can quickly prevent unwanted noise.
3. Make sure with both hands you go in order of pinky, ring, middle and index, make sure you have exact co-ordination and syncronisation between your two hands.