There's a fungus known as dead man's fingers... because it can literally look like the fingers of a corpse bursting out of the ground.

You’re walking through the woods on a crisp, late October afternoon, smelling the sharp scent of decaying leaves and listening to the dry rustle of beech leaves in the breeze. You decide to take a break, sit on an old stump, munch an apple and observe this amazing world…but, what is that reaching up...