Here is a casino shuffle
The idea of a casino shuffle is to not let the cards come off the table so that no one sees their faces
Have your hand on the deck and the deck on the table.
Grab the top portion with one of your hands.
Separate the top from the bottom
Keep it as close it the table as possible.
Place your first fingers on each deck and push down
Start to pull your thumbs up to release the cards at the same time.
When they are done grab each portion of the deck...
And push them together (stay on the table)
Square it up.
And continue until thoroughly shuffled.