"Things You Wouldn't Know If We Didn't Blog Intermittently."
You didn't learn the lesson, or you didn't watch the whole video. If you call it in the air, and it isn't what the person threw, they correct it by flipping the coin over onto their arm instead of just opening their hand. It cannot be beaten by calling it in the air.
This is why for sports games, they let it hit the ground and read it as it stops without touching it.