He's climbing the Matterhorn and didn't do any preparation. First Alpine climb, first time he ever put on crampons, no prep, no guide, just winging it. He even got lost along the way and couldn't think straight because he hadn't acclimatized to the altitude ...
He can be a really crazy, irresponsible dude, but he does impressive feats like competing in the world's most difficult triathlon with barely two weeks of training and then not only finishing it but beating people who had been training for that race for years.