I once ate a snail and I kept the shell because I was writing an essay on Leonardo da Pisa and figured I might want to take some measurements of the shell later to check if its spiral was related to the Fibonacci sequence. Turns out I never actually threw the shell away, because after getting back from a holiday a few months later, my whole room smelled worse than ever. Nobody could figure out what it was, until I grabbed a cube and noticed that it was covered in some sort of sludge. Apparently, there was still a bunch of garlic butter in the shell, and it had started rotting and dripping out of the shell, ruining some of my cubes in the process.