The guy who did it says he averaged about 14 hours per triathlon. That's most of your waking day, right there. So when did he sleep? Well, in Tennessee he says he fell asleep on the bike and crashed. Anyway, if this appeals to you, you'd better be a person who can get by on short hours of sleep.
These aren't regular organized triathlons, of course. These are stunts, where you run a course you design yourself. If you wanted to cheat, the opportunities would seem to be there. But maybe nowadays these people hook themselves up to electronic tracking devices and broadcast their locations real time, with pictures, as they move, on Facebook or Twitter. That's the modern way!
I'll just say what I feel:
This holds no appeal.
An Ironman's a brutal test.
Afterwards, you need a rest.