Where did we left?
Oh, right, we introduced the new Animated API that lets you handle Native iOS and Android animations in React Native.
Then we talked about Brent Vatne showcasing it with its Tinder-style gestures/animations.

That's where Jason Brown kicks in, he has took Brent's code and simplified while writing a nice tutorial around it.

React Native Animated API with PanResponder blog post

Showcase on RNPlay