Keller Williams is a one-man-band has built a career on his uncanny ability to captivate a packed house-all by himself. For over 100 shows a year, "music's mad-scientist" has proven himself to be a master of improvisational performance art. In his one-man show, he pads barefoot from guitar to bass to percussion stations, using looping effects--and enough instruments to stock a strip-mall music store--to layer sound atop sound until the stage swirls with a full-blown composition.