Jaws- Shark Cage

But the fish did not turn. A shiver traveled the length of its body as it closed on the cage. It struck the cage head on, the snout ramming between two bars and spreading them.
	The snout hit Hooper in the chest and knocked him backward. The camera flew from his hands, and the mouthpiece shot from his mouth.
...
It was then that he saw the wide gap in the bars and saw the giant head lunging through it. He raised his hands above his head, grasping at the escape hatch.
	The fish rammed through the space between the bars, spreading them still farther with each thrust of its tail. Hooper, flattened against the back of the cage, saw the mouth reaching, straining for him.

-Jaws, Chapter 13