His hips were way above his opponent and the man landed on his butt. For the pancake, u want ur hips just about at the same level or below your opponent's hips, and you want them to land on their head, back, or elbow. I really need to write a tutorial for this; most people get confused on what a pancake is.
Check this too see what a pancake is irl: https://i.imgur.com/A9vr6t5.gifv