Jaws- Bang Stick

"What is that?" said Brody.
	"Some people call it a bang stick. Others call it a power head. Anyway, it's basically an underwater gun." He pulled both ends of the stick, and it came apart in two pieces. "In here," he said, pointing to a chamber at the point where the stick had come apart, "you put a twelve-gauge shotgun shell." He took a shotgun shell from his pocket and pushed it into the chamber, then rejoined the two ends of the stick. "Then, when you get close enough to the fish, you jab it at him and the shell goes off. If you hit him right --in the brain's the only sure place --you kill him."
	"Even a fish that big?"
"I think so. If I hit him right."

-Jaws, Chapter 13