I was as happy as a schoolkid with a new crush when I read about the discovery of evidence that dinosaurs performed mating dances similar to those performed by their avian descendents. Just imagine a pair of forty-one foot (12.5 meter) long Acrocanthosauruses cavorting like cranes:
I can imagine the earth shaking under the impacts of such a dance.
Of course, this evidence is not conclusive, though it is highly suggestive. It's possible that these scrapes don't represent mating dances. Perhaps dinosaurs danced to demonstrate their victory over alien monster threats:
Can I get some grant money to watch kaiju films? I promise I won't drink all of it away, just a lot of it.