The entire arc where Carney and Carnita attempt to find out how to make babies. Highlights include them discovering Luis Rey's painting of two Carnotaurus mating (and completely missing its point) and the time travel/flashback sequence.
Anytime Carney eats something he logically shouldn't be able to (a Giganotosaurus whose head alone is larger than the front half of Carney's entire body, an invincible robot, hadrosaurs illustrated in a book, a Carnotaurus that Carney mistook for himself in a flashback, etc.).
The Take Thats towards creationism and intelligent design.