You are correct, I had forgotten about the last experiment with the light shining across a distance. For some reason I thought that the gyroscope was the one that they ended on.

Bob may have been confused about the shape of the Earth, but he was still a person with family and friends. A good thing to remember about all of these people.

The documentary was called “Behind the Curve” and featured Bob Knodel. Unfortunately he passed away this year. https://www.robertsfhsc.com/obituary/RobertBob-Knodel

It looks like you still believed in the theory though. He had a YouTube channel that was devoted to flat Earth conspiracy.