He never explained how satellites work with regards to them orbiting the central mass of the earth and just stated them impossible, I would be interested to see how he would respond if we asked why we need satellites to communicate when there is no curvature.
OK
NOW I KNOW HE IS CRAZY he said that the sun is much smaller than originally stated but if it was that small fusion could not occur at the rate it currently does making it generate much less heat and a different type of light all together....