Closer to the body, more to the side than in front, weak grip, strong aggressive swing, firm stance, leaning forwards slightly.
It's used mainly against western grip topspinners, or guys who don't like a shin high ball, which can be anybody.
Usually, in practice, it's hit for about 10 minutes straight, without a topspin or conventional slice to throw form into disarray. After than, you can practice your topspin backhands and wide defensive backhands. Of course, this is the stuff of practice partner level tennis. YOU help him, he helps you, to get better and better.