Well, I heard on a local rock radio show here in Portland that the humor behind the chickens, washers/dryers, etc. is due to Geddy not using amps behind him to be able to hear himself play, rather he uses earphones or something to that effect. I'm not a musician so don't remember the exact terminology of his equipment, but that's the jist. Apparantly, according to the show, Geddy is mocking Alex for still using stacks behind him by replacing his with the chicken roasters.
I'm not sure how true any of this is, but it makes some sense to me.
