Panoramic photo with iPhone and iOS6

We were at a football game last weekend when I noted someone taking a panoramic photo with their iPhone.  I just now realized that it is a feature that was available with the iOS 6, not just the iPhone 5.  I wanted to take a panoramic photo of the sundown over the lake the other evening, but realized I didn't know how.  I did a quick search and discovered that I had overlooked the buttons at the top of the camera screen.  The video below is a short how-to.