From 1974's Macy's Thanksgiving Day Parade: the ultra-bizarre musical PLANET OF THE APES float. If you missed it, trust me when I tell you it was completely insane, and it pretty much signaled the death knell of the APES craze.
I mean, think about it for a minute. It's a musical float in honor of a dystopian future in which mankind nuked itself back to the stone age and apes took over, going so far as to sport hunt, geld, vivisect and stuff what remained of humanity. Great fodder for what's supposed to be a happy family holiday!
And I would have killed to see the apes rock out to the Shandells' "Go Go Gorilla."