Wow - just watched the Marvin Gaye clip - that's the first time I've seen the Hook in action - Victor does some great stuff with 8 fingers on the fretboard, but James Jamerson did it all with just the index finger of his right hand!
 
That's not to put down Victor Wooten - saw him earlier this year in Japan, it was a great show! Got to meet him afterwards:
 

 
(My wife and I in the middle, my buddy Jack on the left - he used to do lights, then sound for my old band Jiggle the Handle (later renamed just Jiggle) - he was doing sound for Victor in Japan!)