Complex sentence: Surprised by Stan's act, Bill and his band tried to follow Stan, but Bill eventually took his hands off his piano after few seconds in the song, leaving just Eddie and Marty to play along Stan's solo.
Split into simpler sentences: Surprised by Stan's act, Bill and his band tries to follow Stan, but Bill eventually takes his hands off his piano after few seconds in the song. Bill's piano in the early part of the song and eventually stops, leaving just Eddie and Marty trying to play along Stan's solo.