Why yes, that is George W. Bush's severed head on Game Of Thrones

You'd be forgiven for being far more concerned with an altogether-different severed head at the end of the first season of Game Of Thrones, but as revealed on the show's DVD commentary—and picked up by io9—it’s joined by another rotting skull of some minor political significance. While commenting on the spiked traitors lining King's Landing, executive producers David Benioff and D.B. Weiss reveal that "the last head on the left is George [W.] Bush," explaining that, while the rubber facsimile of Bush was used in several beheading scenes, they definitely didn't intend it as some sort of statement, even though it's kind of hard not to read it as such.