realizing that this was posted 5 years ago, and that "if you don't have anything nice to say," may apply; I am going to say it anyway:
What an idiot move. I am not one to minimize risk at the cost of adventure. But I also do not take those risks to show off or pose. It doesn't matter how strong he is, or how comfortable, all it would take is for his hand to accidentally grease, and it is a climbing career ending injury.