It was over in an instant.

Sammy saw him catch the wrist of the uplifted arm, heard a dull snap and a groan, saw the knife fall from the helpless hand, and then saw the man lifted bodily and thrown clear over the wagon, to fall helpless on the rocky ground.

The woman gave a low cry, "Oh, WHAT A MAN!" Wash Gibbs, too, opened his eyes, just in time to witness the unheard-of feat, and to see the bare-armed young giant who performed it turn again, breathing heavily with his great exertion, but still ready to meet his big antagonist.
The defeated bully rose from the ground.

The other stepped forward to meet him.

But without a word, Gibbs climbed into the wagon and took up the reins.