Complex sentence: At about the same time, Zappa made a memorable appearance on "The Steve Allen Show", playing "a bicycle concerto" by plucking spokes and blowing through the handlebars.
Split into simpler sentences: At about the same time, Zappa made a memorable appearance on "The Steve Allen Show", playing music on a bicycle. Later, he played "a bicycle concerto" by plucking spokes and blowing through the handlebars.