You and your friend have been dropped off by helicopter at the southern end of an island in order to observe an endangered species of bird.
The island is very small. It’s only a hundred yards wide and a thousand yards long. It also has sheer cliffs hundreds of feet high all around it. But finding the rare bird will be difficult because the island is covered in thick brush that’s five feet tall.
Unfortunately, even before you’ve started your search things take a bad turn. You see smoke. As the helicopter took off over the northern end of the island, the pilot flicked out a cigarette butt and inadvertently started a fire that smoldered unobserved for a while and then flared up. It’s now being fanned by a strong wind heading in your direction, and you have no way of contacting the helicopter or calling for help.
The fire will reach you in half an hour. You don’t have any tools with you, so you try to dig a hole with your hands but the ground is too hard. You look over the edge of the cliffs and realize that even climbing down a few feet is impossible, and jumping would mean certain death.
Even from where you’re standing you can tell the heat of the fire is intense. Trying to run through it would be fatal.
So, in order to survive, what do you and your friend do?

Thanks to Everything He Hasn’t Told You Yet by Burton Silver & Martin O’Connor