OK, Dan, here's one for you: This South African fretless bass virtuoso was fixing cars in Soweto to support his sick mother when he was "discovered" by Paul Simon during his 1986 "Graceland" project. He couldn't speak English or read music. His seminal bass run in "You Can Call Me Al" features the second 1/2 of the bass line being the first 1/2 played backwards on an old Washburn fretless!
Yesterday's answer: The Seekers' "I'll Never Find Another You". http://www.youtube.com/watch?v=4Ga9Bs4fzSY