rotation jam

A "rotation jam" surprisingly has nothing to do with firearms. It is in fact when members of a band play each others' instruments, switching several times until they have played most or all of the others' parts. I imagine this takes a considerable amount of talent... A Google search for the term yields a lot of documents about Phish, who seem to enjoy the practice.

December 29, 1996
Corestates Spectrum, Philadelphia, PA
The rotation jam grew out of You Enjoy Myself and ultimately became Sixteen Candles (with all band members back on their normal instruments).

February 13, 1997
Shepherd's Bush Empire, London, United Kingdom
The rotation jam was, in fact, during Walfredo but this show was the first performance of Walfredo. As such, the existence of the rotation jam precedes Walfredo.