Had to do some research on this... in the droning "pre-nirvana" section of the intro, Trey sings a haunting falsetto melody three times. Charlie Dirksen's old review of the YEM from RMP mentions that Trey also sang this during some stage banter preceding the YEM from 5/11/88. Listening to that version provides Trey's lyrics: "Who's the Mar Mar? Mar Mar is waiting for me." "Mar Mar", of course, is a nickname for Trey's dog , Marley. Both the melody and lyrics are clearly the same. The melody sounds like something from a Brian Eno album, which would make sense as a pre-Halloween tease, but I couldn't place the melody. I suppose it is just as likely that Marley had rejoined the tour and Trey sang it again for her - this would also explain the "Shaggy Dog" bustout the following night in Louisville. Hmm.....