What did Will do just before he saved Jacinda from the other hunters?

In Chapter Two, Jacinda hears the sounds of the hunters. The hunters know she jumped but aren't certain whether she flew after making the jump or hit the water. During the argument over who will go into the water after her, she hears a distinctive voice volunteer. The boy, Will, jumps into the water and quickly announces that he sees the cave. Will spots her quickly and moves toward the cave. Rather than calling out for the others, he swims nearer and stares at her. He touches her and heat flares between them. There's a moment in which there's a definite connection and Jacinda thinks she hears him say, "beautiful." As the other hunters begin yelling out to him, he breaks contact with Jacinda, telling them "it" isn't in the cave before swimming away.