Santa Dino

In the late Cretaceous period, nobody believed in Santa Dino any more.
The bratty little dinosaurs were into bloody video games on their obnoxious cell phones and had no more time for magic and holiday cheer.
They were all bad little monsters.
That's why, one Christmas eve, instead of giving them each a lump of coal, Santa Dino decided his rounds were going to be extra short...
He was going to send just one big rock down from the heavens and get the business all over with.
An asteroid, to be precise.