There was some sort of birthday party going on in the back area of Grandpa Eddie's, attended by a number of people, at least one of whom was wearing a big ol' cowboy hat (see him back there lookin' all lone-wolves-don't-sully-their-paws-with-dancin'-y?). Though they may or may not have shown up specifically for the Illbillys, they SEEMED to enjoy themselves.
