What's the most high-end, elite thing you've ever done (or heard of being done) in Hawaii?

I hang out with mostly local people with mostly local jobs, but I have 2 friends that live in Hawaii Kai and some of the stuff they do just seems like out-of-this-world elite level stuff. Marlin fishing on luxury yachts around Big Island - stuff like that.

What's the most high-end, elite thing you've ever heard of being done in Hawaii? Private country clubs? Yachts? Something else?