Because running 26 miles isn't quite hard enough, a group of 214 hardy souls are currently taking part in a six-day, 150-mile super-marathon. Across a desert. In Namibia. With all their food for the week on their backs.

The idiots athletes are competing in an event organized by Racing the Planet, which has put on 18 similar events in various inhospitable locations over the past decade or so. They will sleep six to a tent, survive in the 120-degree heat on rationed water handed out from all-terrain vehicles and carry whistles to scare off any wild animals.

But it's not all hellish misery. "When you've got a CEO of a major company copping a squat in the desert, you are seeing them in a way their board members would never dream of," explains Racing the Planet veteran Sandy McCallum.

Hmm. If we're ever desperate to watch an executive taking a crap, we'll just hang out around Merrill Lynch's offices. It sounds a lot easier.