In the episode where Scooby and the gang meet Don Knots and they get trapped in a cave. In the cave they see a Brontosaurus or Brachiasaurus (I forget which) that has long, sharp meat eating teeth. Scooby and the gang even mention how long and sharp they are, because at first they thought its teeth were stalag-tights and stalag-mights. This is a slip-up because that species of dinosaur is a herbavore and it has flat leaf eating teeth.