"Not unless you want an audience," Mathias says with a laugh. "Because the first time I tried to get into one, there was much cursing. My brother thought it was very funny." And he's sure in a place as crowded as the Compound something like that will draw more than a few spectators.

"But at least we've found you something. That means you'll actually be able to dive without getting too cold, which means you can stay in the water longer. It's easier to learn that way and it's more fun, really." He's excited to teach her, he's always excited to teach anyone to dive, but especially Sookie.