Facial stretching. It happens from heavy lifting with deadlifts and squats creating massive internal forces. Rolley has his repaired. Some people are prone other are not. Plus you only notice on these guys because of the very low body fat levels. I have taken gh for over a year. My stomach is bigger ow because I’m fat, lol. If you watch videos by the pros, they talk about how huge amounts of food eaten due to insulin use increased their stomachs. But now that a vacuum is becoming more prevalent, they are refusing their food intake and most think insulin is a waste now.