to find out, took to the water of the wild and rocky pemberton coast. diving into ocean swells and climbing rocks, i passed an organized group. it is not without danger, but safety on these trips is always paramount. >> this is a natural playground. there are rocks and everything else, and it is not always safe. there is a chance you will slip and fall and get hurt. is not completely safe, but that is what makes it such good fun. >> but there is a much more dangerous, unregulated flip side. it is called tombstoneing. it is a group of individuals that has arrived at the coast, no emergency plans in place, and oftentimes they have been to the pub for a quick drink before doing it. >> nick was just 17 years old when he jumped in a jackie on a bet. he smashed his head on rocks and is now paralyzed. >> i tried to swim to the surface, as i had before, and i blacked out. >> across the country, people have been injured or killed. it is a fantastic day's fund, making the most of our wonderful coastline. >> addressing the risks of the natural world, sam the koala