To view this video you need to login.
This is a progression of the cross court short game (see clip linked below).
In this variation, you are allowed the option to hit one shot back to yourself (a set up) for you to volley into your opponent's front corner.
It tests your speed of reaction to retrieve your opponent's shots and your ability to find the nick . As you get better at this game, you can become quite inventive, and some hard fast sometimes comical rallies will ensue!