I put in the Alan Parsons Live In Madrid DVD again the other day, and I noticed a couple of subtle Pink Floyd references.  I was probably extra-sensitive to those because I had listened to Pulse and In The Flesh before.

During the "spooky" section of Psychobable, you can vaguely hear (and see) the drummer whispering into his mike.  He's saying things like "There's no reason to be afraid of dying, you gotta go sometime".  And I can't shake the feeling that this version of the spooky section sounds suspiciously like On The Run.  Both snippets are taken from Dark Side Of The Moon, on which Alan Parsons was the sound engineer.

The second is at the start of Sirius: the guitarist plays the typical "ploing-Ploing-ploing-plooing" from Shine On You Crazy Diamond (on Wish You Where Here).  As far as I know, Alan Parsons was not involved with that album, however.