You and three friends are trapped on a desert island. One of your friends comes down with serious appendicitis, and could very well die if his appendix isn’t removed.
None of you are doctors, none of you are surgeons.
Also, there is no metal, wood or any hard substance at all on the island you could make tools out of. There are rocks, but they have the consistency of soft cheese. Everything is soft and floppy.
How do you remove your friend’s appendix?