Q&A: How could the young biblical David kill a huge giant such as Goliath with only a slingshot?

Kind of like this—only with a lot more trees

Do not underestimate the abilities of a young shepherd in Judea in biblical times. He constantly had to protect his flock of sheep and goats from attacks by brown bears, leopards, and Asian lions, which still roamed the woodlands of the Judean foothills. Failing to do so would have got him in deep trouble with his father, so he had to become very adept at fending off such threats by whatever means possible—including devastating use of his slingshot.