I'm not sure how many people know that technique, and it's one that I learned fairly recently, where you drop your fingers on the keys with the weight of the arm behind them as opposed to just pressing the keys down with the fingers.
Can such a trivial thing be called a "technique"? I was never told of it before I had discovered the strength of help from gravity, experimenting on the keyboard, gaining consciousness over my hands.
Well, technique is just the way that people play a piano, so I guess it would be one. Whenever you're playing the piano, you're using a technique. Good, bad, whatever, it's a technique.