Here's a short (<1min) video made from the film "Behind the Curve", a documentary about Flat Earthers.
This clip shows a Flat Earther doing an experiment to attempt to prove that the Earth is flat, but instead he proves that the Earth is round. His reaction is priceless.
(The documentary is 95 mins, but I don't think I'd waste anymore time on it than this short 1min. video.)
Apparently the guy who made the documentary said he did it in part to make people think about beliefs that they may be clinging to.
It's easy to make fun of such silly beliefs, but I've seen this same kind of stuff happen in quantum physics -- scientists clinging to their theories in the face of new evidence.
@Pat I don't make fun of them. I think its fascinating. I used to watch all the videos of their conventions they have.
I just recently learned how widely this whole stupid theory is -- they try to make it seem scientific. It really is fascinating as a social phenomenon. UFO believers is another one. And of course all the nonsense coming from the maga folks.
I'd like to see a study done on these people where they put them into a fMRI to determine exactly how many are just playing along with the hoax and how many actually believe it.
@Pat I've seen that. The look in his eyes is really telling when he realizes. Kind of sad.