i was out of town for a few days and visited the local Guitar Center *shudder* to kill some time. they were running a video of a bassist jamming with a drummer. i asked who it was and the guy said "jaco". so i gazed at it for a while just taking mental notes (like that would help!). my 10 minute observation on his playing is that he looks very stiff and uncomfortable while playing. maybe because he knew it was an 'instructional' video? don't get me wrong, he was solid as hell, but just looked uneasy.