That is how the iPad was position on the Mac screne when it slipped out of my two hands.
There are black blinking lines on the bottom of the screen too.
I have AppleCare+ and that screen replacement was free. It just pisses me off to see how vulnerable the screen really is, how little impact it can take to cause damage. I'd say dropping the iPad like that was equivalent to a light punch. Also, getting the screen replaced twice in a month?!