David might have used Jiu-jitsu to calm Goliath down instead of a slingshot, had the martial art been around during the Biblical age.
A smaller man with good technique can overcome a much larger opponent, according New Plymouth man Pina Simpson, who was a Professor with a First Degree Black Belt in Brazilian Jiu-jitsu.
"That's the basics of Jiu-jitsu, using leverage and balancing to control someone who is way bigger than you," he said.
Brazilian Jiu-jitsu club Tsunami Southern Tribes held a national tournament in Levin at the weekend with more than 100 members of all ages competing.
Simpson said at the heart of Jiu-jitsu was teaching people to being able to control an aggressor using a variety of techniques that could subdue or diffuse a potentially violent situation.