The first time I heard this, it was from the Talas "High Speed on Ice" tape. Blown away.
[VIDEO]http://www.youtube.com/watch?v=IvR3HzH-jKY]NV4 3345 - BILLY SHEEHAN - YouTube[/VIDEO]
This guy is the Yngwie/Gilbert/Becker of bass. I have no doubt if he played guitar, he'd be in the top ten shredders.