Trying to stay awake this evening, but beginning to feel like someone's hooked 10kg weights onto your eyelids? Just use this handy list of skin-crawling material and you'll feel like you've been defibrillated back into consciousness. Or you'll have a nightmare-filled sleep... Either way it'll be scary. Go on.
Teratoma tumors can contain pockets of hair and teeth, and can very rarely grow more complex organs such as eyes, feet, hands and other limbs.