Here’s a nice video showing off the base skill and all five runestone effects of the Demon Hunter’s Rain of Vengeance skill. This is the highest level DH skill and has never been public demonstrated by Blizzard, so you could consider this video a spoiler. Also, expect some changes in the visuals in the final game, as this came from an emulator and the animations look unfinished.
That said, it’s a nice preview of this “death from above” multi-hit skill, and the various flapping shadow demons are pretty cool. The video goes up to 1080 full screen and still looks good, so enjoy. Thanks to Azzure for the tip.