What he said! He was just mad you called him out on it and you were right!
Good story, thanks for sharing!
I had the same experienced (warned next word would be tossed) when the ump said he had seen chalk fly up when the ball hit the leftfield chalk line. I calmly told him I didn't think that was possible since the outfield lines were painted. He took it about the same way as the ump in the original post.
Haha.