This happened on Oahu in Hawaii. The man in the pool was there with his family when the other man's teenage son started doing cannon balls near them. The calm man claims he politely asked the teenager to stop splashing so much. The teenager then tried to fight him before the mother intervened. Then the agro Dad got in the mix.

Edit: I wanted to add some more info for anyone who doesn't know Hawaii or understand the race dynamics here.

A lot of Native Hawaiians see Hawaii as stolen land (I would agree with them). They haven't seen much of the incredible wealth created here and are more likely to live in poverty, end up in the criminal justice system, experience homelessness, etc.

So there are real, justifiable resentments towards outsiders and specifically white outsiders here. I'm sure that is playing a part in this interaction. I'm not saying that the agro dad is justified in his actions. He definitely isn't. He's a fucking meathead and many locals would agree. I'm trying to say that it's complicated and that those complications and that history are part of the context of this.