The songs "665" and "667" are parodies of the idea of Satanic content in rock music, the idea being that if 666 is such a powerful number, then the surrounding numbers must be equally as powerful.
He appears with the lineup of Cornell, Thayil, and drummer Scott Sundquist on the Deep Six compilation, and with the lineup of Cornell, Thayil, and drummer Matt Cameron on the EPs Screaming Life, Fopp, and Loudest Love, as well as on the albums Ultramega OK and Louder Than Love.