Wish I Was In Heaven Sitting Down -- Justin Johnson -- Diddley bow

http://youtu.be/Bgq8d3iYZ00

關於這樂器 https://en.wikipedia.org/wiki/Diddley_bow

The diddley bow derives from instruments used in West Africa. There, they were often played by children, one beating the string with sticks and the other changing the pitch by moving a slide up and down. The instrument was then developed as a children's toy by slaves in the United States. They were first documented in the rural South by researchers in the 1930s.