Heinstein Shuffle (DV) Karl Hein
The Heinstein shuffle is an in-the-hand riffle shuffle complete with waterfall cascade. The shuffle looks like a legitimate shuffle (you apparently see the cards mix together into each other during the waterfall cascade). In the end, the complete deck is left in the same setup it was in before the shuffle commenced.
The shuffle is a very effective non-table version of the Zarrow shuffle. While it is not particularly easy to learn, the video is very instructive in teaching the correct technique.