Do I know what you're talking about is a funny question, when you don't even seem to know what you're talking about. The evidence that you are referring to is that the moon dust supposedly DIDN'T fall in a parabolic arc, because parabolic arcs are what happen here on earth. So you asking how they faked a parabolic arc, is gibberish.

I'll give you the benefit of the doubt and answer the question I assume you thought you were asking; Why DIDN'T the dust kicked up by the rover fall in a parabolic arc?

The answer to that is simple, we have a tiny amount of footage that shows this and the way the dust falls is hardly conclusive, many scientists still debate it. We also have testimony from astronauts who were supposedly there that contradict the dust NOT falling in a parabolic arc:

Apollo astronaut Charlie Duke did say, while describing what it was like to ride in the lunar rover, that “Moon dust was pouring down on us like rain, and so after a half of a Moon walk, our white suits turned gray.”

This contradicts your story that the dust DIDN'T fall in a parabolic arc, and in fact was kicked up into clouds that poured down on them.

Thanks for playing, try again.