It didn't. Look at the way the cards are landing in my hand in the first photo, then look at the way they are landing in my hand in the second photo. See if you can spot the difference.
The sound I herd in the first photo, was a slithering of cards neatly in to my hands.
The second photo I herd the edges of half the cards tapping the cards I had caught, and then a pitter patter of cards landing on the floor.