kahona arch. the plan, to build what they say will be the world's largest rope swing. then clip in, and jump off. w why you ask, because it's there. an experienced rock climber has been here dozens of times, but leaping off the arch is new territory. >> as you're climbing up it, you're thinking this is crazy. what am i doing up here? then you get to tp to, and you look out, and you can see the entire valley. you can see the clo river. it's gorgeous. then you think, i just want to sit up here. why am i going to clip to a rope and jump off. >> it's a legitimate question, but there's no back out now. austin's friend is going to capture it all on camera and then spin it into a viral sensation. it won't be the first time.