It was either this show or 10/31/92, but for Cavern->Vacuum Solo->Cavern, while Fish came out to play the solo, the band had stopped playing, but in addition, Mike was (I believe) leaning all the way forward while Trey was leaning all the way back, neither 'moving', and Trey was there for so long I remember thinking he must be breaking his back...I don't recall what Page was doing, maybe slumped over his keyboards? After Fish was done, and he returned to his drum kit, those three resumed normal position and finished Cavern without saying a word and acting completely normally. I remember thinking that's a weird little 'show inside the show' thing happenin'.