Prompto's just taking pictures of those Helios fish, minding his own business, when the noise of something humongous behind him makes him turn.

"Wh-whoa!"

Maybe he ought to reach for his gun--who knows what that thing is, or if it's friendly?--but his first reflex, his forever reflex, is instead to step back so as much of Stone is visible as possible, raise his camera, and take one hell of a picture.

"Got it!"