Black 15 considered to be a trickplay for a long time and it’s hard to find such examples in pro vs pro games.
Chinese professional Li Zhe used this move and for sure he studied it a lot before trying.
It’s a very interesting invention, which can be used in every game.
In Go books you can only find the variations with the low pincer, but the difference is very big.
Feel free to try it in your games!