A lady in Comox once tried to commit suicide with a plastic flare gun. She pointed it, point blank, at her chest, and pulled the trigger. It bounced off, and bounced around the cabin, setting the boat on fire. Only burned hell out of her tits, but didn't penetrate. A slingshot has more power.
Brent Swain, Boat designer, Builder, and author of "Origami Metal Boatbuilding"