Because she's done it, he has to as well. For the most part, Mathias isn't competitive, but he has a feeling Veronica might appreciate someone who can hold his own under a simple waterfall, even if he'll never be able to hold his own against her.

Diving under, he cuts through the water cleanly, long strokes that pull him through to the other side. He remembers swimming under a waterfall for the first time when he was fifteen, being surprised by how heavy the water felt. Popping to the surface, he runs his hands over his head and grins at Veronica.