Miragedriver
Brigadier
Yes, LOL...but you must know where to bang, and how hard to bang, to achieve the desired results.
There may even be a time component to it so that you would also know when to bang.
In fact the timing and the strength of the banging may be a function of one another...we simply do not have enough data to know.
Jeff, I believe you are referring to technical term known as the “Fozi bump” as seen on the American Television program Happy Days.