[ He tries to be reassuring, offering her a smile. ] Hey, you're doing great. Think of it like this: if ever you're in a bind, you can always float. You don't even need to do anything! When you float, your weight presses down into the water, and as long as you weigh less than the water you're displacing, you'll float. And luckily for us, our lungs are full of air, sooo....boom! Some people float differently, and you'll float better in salt water because it weighs more per volume...

[ He just keeps going on the science of buoyancy. He's talking to talk rather than talking to inform her, though if she's even listening then it's good stuff to know. The flow of his words is even, and he lets her squeeze his fingers as much as she likes until he can tell she's more comfortable. They stay like that for some ten or fifteen minutes to practice, both on her front and on her back. It's definitely different than from teaching his little cousins, but the actual content doesn't change. ]

You feeling okay to move on, Rey? [ He did say there would be kicking. ]