A man has been jailed after fighting three college students who shot his dog more than 40 times with BB guns.

When three college kids returned home on break, they used a neighbor’s dog for target practice, shooting him over 40 times. The resulting punishment for this cruelty? A mere fine and community service.

The dog’s owner couldn’t accept the light sentence. He stormed over to their house and challenged all three at once. “Fight someone your own size,” he told them.

What they didn’t know, he was a black belt in Jujutsu. By the time police arrived, the kids were bloodied and broken—lesson learned. The man left in handcuffs, but with a smile on his face.

He will spend 30 days in prison. His dog is recovering safely at his mother’s home. When asked why he did it, he said simply:

“Kids need to learn there are consequences to their actions.”