Two juvenile gorillas fight until dad shows up

In this video from a recent trip to Animal Kingdom, I came across this gorilla exhibit with some hilarious stuff going on. You must watch until the end because there is something else that I only noticed after my final edits. Something that I didn't notice during filming. See if you can see. So gorilla's are impressive majestic creatures in my opinion. Right? Not just similar looking to humans but behavior is uncanny at times. Like children playing or perhaps arguing, fighting too. I am not sure if this is typical gorilla behavior but feel free to comment if you know anything. These animals seemed oblivious to the fact that they have an audience. They are going about their daily life, hanging out, gathering food and eating. They are playing and wrestling or is it anger fueled fighting? I don't know. But a couple of these little gorillas were really going at it with punches and even what appears to be a "nuggie." Sort of what big brothers do. At least that is what happened to me. These gorillas are rolling around for a bit. Punching, wrestling, and what looks like biting. Then the big gorilla, the father I presume shows his domineering presence and then they suddenly stop as if knowing that they shouldn't be doing that. Is he getting ready to discipline or is his stare good enough? The father continues to observe while they pick it up again. I wonder what was going through his mind. At one point, one of the "witness" gorilla appears to take off in a way that says "I'm outta here, don't want no part of that." It was a great experience to observe these creatures. I am sure that gorillas are smart and strong. I would not want to meet one in a dark alley. Do they have a sense of humor? What does their body language mean? All I can think of is King Kong. Enjoy the video!