'Human Skab was a 10-year old boy from Elma, Washington who played African music with buckets and spoons. Thunder Hips and Saddle Bags is a 1986 cassette recorded by young Travis Roberts with his neighborhood pals and siblings. It was injected into the underground network of tape traders, zine scribes, college DJs, and freak seekers who were universally bowled over by its bewildering and utterly poignant snapshot of the mid-1980s. Skab's music -- an orchestration of pots n' pans, three string gu…