It's the heaviest, most distinctive big wave on the planet and this was filmed on a day when it was at its biggest.
Having that wave come down on you is like being crushed by an apartment block. Here's how Kelly Slater described the day: "Witnessing this was a draining feeling being terrified for other people's lives all day long, it's life or death. Letting go of that rope one time can change your life and not many people will ever experience that in their life."
UPDATE: The original Vimeo by Chris Bryan was taken down (for some reason). But I just came across this version: