You decide the rain ahead looks a bit too rough to make a run for the cabin. You're already winded, and if you try running there right now you'll probably step on one of the mushroom patches on the way, or trip and fall into the stream. Better to stay here and catch your breath. Besides, the silt feels so good on your toes.
Having made up your mind, you sit down at the stream's edge and take off your remaining shoe, setting it next to you on an old stump. Next comes the dry sock, which you put with the shoes. You pull off the other sock, the one soaked through with mud, and stick your feet in the stream's edge to rinse them off. But as the water washes away the silt, you feel a strange sensation on the bottom of that foot. Turning it over to look, you realize something's very wrong.
On the bottom of your foot, betwen your toes and in the arch, is a patch of purple fibers, just like the mushrooms. And it's slowly, almost imperceptibly spreading.