Record game physics to IPO problem

Whenever i try to record game physics to the ipo curve editor, most of the time it doesn’t work. Why?

It only moves natural objects, as it states record PHYSICS to IPO. this means if you control an object your defying physics and it won’t get recorded.

For inspiration, see:

With some work, it is possible to record Physics and Paths to produce an IPO curve on an object. For an example of a Ball falling with Physics, bouncing along a Path, and falling again with Physics, see: