Stare at the people passing the ball and try and count how many times the people in the white are passing the ball. Post how many times you counted down below. :)
well Donkey, the whole point is SPOILER ALERT ---- when you only focus on the white shirt people, you usually don't see the gorilla. that's how it worked for me the first time. my professor was like "count the amount of times the white shirt people pass the ball" and I didn't see the gorilla until watching it the second time.