After beginning ordinarily enough, the jam eventually takes-on a Trey-led melodic theme reminiscent of "hose" improvisation, yet the "type I" form is maintained in a compellingly fierce manner.

This theme-jam takes over four minutes to begin peaking, soaring, in a dizzyingly beautiful fashion, and then Trey turns on the syrupy envelope-filter effect, and Mike begins playing lead fucking bass, with fantastic accompaniment from Page, who then begins soloing a bit over this incredible groove being laid down by Mike, Trey and Fish around 16 mins in. Spine-tinglingly cool, repetitive, grooving takes over, and Trey begins soloing melodically o'er it before Fish returns to Tweezer's drum line, and the jam dissolves away as Trey nearly teases "Lifeboy" before Bitch begins. It's a safe bet that if this sick improv doesn't move you, then 4.0 Phish is not for you.