"Huh? Where?"
You point. "See that spitting image of the love child of an armadillo and a tank?"
He looks around wildly, spilling his champagne.
"Over there. Coming along the trail."
All joking aside, this is a potentially serious development, even if the creature is an herbivore. The ankylosaur isn't accustomed to humans and might not react well to one intruding into its territory. Casey is carrying no visible weapon. In fact, you have no idea if any of them brought weapons, or if they might panic and do something dumb. You could try to protect Casey by driving the beast away, but you might not get another opportunity to film yourself warning Casey as the fierce-looking dinosaur approaches. Or do you just want to seize your chance to get out of here?