Breastplate stab

The giant laughed so hard that he didn’t realize Percy was charging until it was too late. Percy jumped up, vaulting off the giant’s knee, and drove Riptide straight through one of the metal mouths on Polybotes’s breastplate, sinking the Celestial bronze hilt-deep in his chest. The giant stumbled backward, tripping over Terminus’s pedestal and crashing to the ground

SoN ch. 50