this dude is pretty good (mainly just percussive speed...nothing fancy with his fret hand), and mark king is good too, but I agree with brem...victor wooten is hands down the best. He's got the total package: speed, mastery of multiple techniques, created his own techniques, etc. Even seen him play two basses at one time. Sick nasty. Also, I bet gmuller is right, this dude used to play tabla.