Yeah, the cameramen in the water are the unsung heroes. One time I braved Sunset in about 6-foot surf with a Nikonos underwater camera and just swim fins.
Then, duh, the waves increased to around 10 feet (measured Hawaiian style, i.e., from the BACK of the wave -- wave face was more like 15 feet plus) and I was really glad to finally make it back to the beach 45 minutes later.
Worst part was fighting to get out behind the breakers, then seeing the surfers getting real small as I got caught in the rip heading out toward Kauai.
Dunno how far I was out, but might have been a quarter mile. Really big water and teeny distant shore. First time I ever felt my hands and feet start tingling and realized I was near panic.
Had to talk to myself and get calmed down. Fortunately salt water is very buoyant, Oahu water is gorgeously clear and warm, and my sleeveless rubber vest kept me comfortable.
Finally made it back behind the surfers and started hunting for the rip to the beach at the end of the breakers. Found it, got to about 10 feet from the beach, then the beach started getting smaller again as the outflow carried me back to sea.
I was getting tired. There were plenty of surfers around but I was too proud to call for help. Finally, just as I was ready to wave for help, a surfer came alongside and said, "Hey man, want a tow?"
I did, and he did. It was so much easier to make progress just getting most my body out of the current and on the back of the board. Yet during most my trial, I was grateful I did not have a board so I could evade each water avalanche by diving down and coming up behind the wave.
Naturally that too gets quite exhausting, especially if in the break zone and surfacing in froth a foot or so deep with more waves coming in.
Didn't mean to ramble, but it was definitely a key life experience. I learned my big wave capabilities, and they weren't much. I love the sea but when it comes to that kind of power, I'm essentially chicken, a land bird.