For me, there's one spot on Tower of Power's Back to Oakland LP - I think that's the one. The cut is called Squibb Cakes and is basically a riff for the band to take turns soloing over. It was a popular song they did in concert and still do occasionally.
This recording's version, though, has a Chester Thompson Hammond B3 organ solo where the whole band stops playing with the exception of the drummer. Chester takes over the bass line as well. Right at the end of the solo, Chester moves through one hell of a set of chords, bass walking down and with the Leslie speakers flying, the drummer (Dave Garibaldi) flailing like mad. To this day, some 30+ years later, it never ceases to raise the hair on the back of my neck.
I used to use this track for testing speakers when I repaired them - at high volume you'd hear any buzz or rattle.
Cheers,
David