Rener called and delivered a pep talk. “Martin, would you rather fight one time and be protected for the rest of your life, or do you want to get bullied for the rest of your life?”

Martin sighed. “I’d rather fight once.”

“Do it, my friend,” Rener said. “The bully still thinks he owns you. Tomorrow he will do the same thing. And when he does, you will engage. You don’t ask permission, you don’t stop, you just engage.”

The next day the bully not only bothered Martin, but he pestered Martin’s friend so much that the boy shook his head and said he might commit suicide. The bully then asked Martin if he could practice some new punching techniques on him, and hit him. Then he threw a water bottle at him.

Everything Martin had learned during his week at the Gracie Academy bubbled to the surface. He jumped off the lunch bench and while in midair pushed the bully in the chest with both hands as hard as he could. Both boys landed on the ground and Martin pinned the bully by placing his knee on his chest and holding his arms down with his own.

It was a classic jiu-jitsu combination — decisive and effective without causing trauma or blood.