My father got involved. I tried to explain it to him several times and he failed to understand me. So I stopped explaining and waited for his 'I'm right and I'll tell you why with all this evidence' babble to die off. He said things like... "centrifugal comes from "centrifuge" (meaning the machine, the centrifuge) and "well, leave physics out of it for a minute..."
I don't know how he did it, but he brought up black holes... one of the most mysterious phenomenons known to science. Hell... there isn't even an agreement on wether or not black holes exist in the first place, let alone how they work.
Anyway, he was 'explaining' how a black hole spins and, in this spinning, pushes some things out and pulls other things in at the same time. Then he said "science and physics sort of come together in one spot."
That bears having its own line.
"Science and Physics sort of come together in one spot."