by no means a PJ reference, I just didn't know where else to put this.
scanning the Zeppelin "In Through the Out Door" wiki page for some reason, and saw this quote from Plant about the album, and made me think of PJ and Backspacer/Lightning Bolt:
In Through The Out Door wasn't the greatest thing in the world, but at least we were trying to vary what we were doing, for our own integrity's sake. Of all the [Led Zeppelin] records, it's interesting but a bit sanitised because we hadn't been in the clamour and chaos for a long time. In '77, when I lost my boy, I didn't really want to go swinging around—"Hey hey mama say the way you move" didn't really have a great deal of import any more. In Through The Out Door is more conscientious and less animal.