The long, involved Rotation Jam to set up Rock A William started when Page went to the theremin for a solo. Soon after, Trey took up the keys and Mike went to play guitar. Page eventually picked up Mike’s bass. After they jammed a bit longer, Mike went to join Trey on the keys. Trey then joined Fish on the drums. The two of them played on the same drum set and Mike took a piano solo. Trey eventually kicked Fish off the drum stool, and Fish picked up Trey’s guitar. SOAM contained a Larks' Tongues in Aspic Part Two jam and a Third Stone from the Sun tease.