(cont) the guy started ragging on the lifeguard and told him he was going to call the Mayor and have his job. The lifeguard calmly informs him that in certain circumstances, lifeguards on O'ahu beaches have arrest powers and not to escalate the situation further. After ranting and raving (I went back in, but stayed on that side "in case") he went to his car. I thought that was the end of it. About 30 min later, I had moved to my normal spot and over a HUGE set of waves, I saw a head popping up and down, but couldn't really make it out cuz da sets wuz big. Gotta pay attention, right?  It was that guy! I looked into shore and now 3 lifeguards, ready to go in were standing on the shore observing. I didn't see the head pop back up after what had to be about 10 eight footers come slamming into shore. I swam straight out, outta the rip, then went right and found the guy underwater.  Dove down and he was unconscious.  He went hospital after we brought him in.  Some people's kids, man..sheesh.