Samite
http://www.youtube.com/watch?v=pdwHegyWtwQ

Bobby McFarrin

http://www.youtube.com/watch?v=UOQ40DqGZ5A&feature=PlayList&p=AD60367991B4D982&playnext_from=PL&index=0&playnext=1

Grateful Dead

http://www.youtube.com/watch?v=YLzUme1gN8c