It's not supposed to be a dinosaur, but the roar sounded like what you hear on all movies for a T-Rex. When they found the pilot, I kept saying out loud, be still, don't move, make no sound. But of course, they moved, and the scene of the pilot by the window, knew he was going to get it.
The filming is done is such a way that you can't see what gets him, also, his body being put in a tree shows that the "monster is tall", but why would this creature put the body in a tree?
When they showed the trees or shrubs going down, you can't see anything, something that big should show itself, and what kept it from going on the beach where the survivors are?
The dog, if it was on the plane, wouldn't it naturally go to the group of people? Instead, it looks as though it is watching.
What made them go down? What if the "creature" is something that was on the plane with them? Whats up with the guy with the orange in his mouth?
