Sharks are a lot smarter than most people think. Saturday, I speared a snapper and carried it on the butt of my spear gun. I was on a scooter. What made me look behind me? I don't know. But within 10 feet was a hammerhead looking directly at my fish. I made eye contact while thinking....Oh Shit! I'd give up the fish in a heartbeat but didn't want to lose the gun it was attached to. The hammerhead made the choice to leave me alone and swim away. They mostly pick their battles even though this one could clearly have kicked my ass.