Head-butted a palm tree. Coconuts. A cautionary tale, preserved in sediment. The real Pachycephalosaurus (say it pak-ee-SEF-ah-loh-SORE-us) lived in the Late Cretaceous — its skull dome was up to ten inches of solid bone. Black-and-white vector ink in the Extinction Fails style — morbid, deadpan and very satisfying on a laptop lid. Teens and up. Die-cut matte vinyl in three sizes; the laminate shrugs off rain, dishwashers and backpack abuse.