Now somebody explain how that could possibly happen in real life.
It is real life.
It’s called backspin on the ball.
That’s why guys like Jack are different from you and me.
http://golftips.golfsmith.com/put-backspin-golf-ball-1437.html
https://www.youtube.com/watch?v=SCL8i9KS3gI
Oh, come on.....these guys are Pros; they hit the ball from the tee in such a way that when it hits a solid green, the back "English" makes it roll backwards.
A downward slope towards the pin helps matters out too.
BTW, Jack has probably played that same hole hundreds of times.