Still . . . that animation was sick!
My wife and I were kayaking through the Florida Keys mangroves a couple of years ago and witnessed a similar sight. The guide we were with said the "wings" of spotted rays are commonly seen darting above the water's surface during feeding and mating - which they often do close to the surface.
My wife was later freaked out, when two of them swam directly under her boat, surfacing just a few feet away.