A raised weight can produce work, but in doing so it must necessarily sink from its height, and, when it has fallen as deep as it can fall, its gravity remains as before, but it can no longer do work. ↗
I did Star 80, which was a magnificent experience as well, but still, I was at the height of my career at the beginning. Then I had to jump down the ladder and climb back up again, which I didn't understand. That was very hard. ↗