Pond and her Doctor

            "Wait! Do you even know where we're going?"
            "Nope! Not a clue!" says the Doctor as he sprints around another corner with the girl just a step behind.
            The Doctor has just rescued Pond, but the pair are still on the run in the compound. He pauses for a moment, and then abruptly turns around and begins to examine her face. He looks her up and down, opens her mouth, peers inside and with a, "Well that's interesting," pulls out of her mouth what looks like a scorpion. But only halfway- it seems to be attached to the back of her throat. He releases the bug, letting it snap back into her mouth, and with a mixture of disgust and terror Amy exclaims, "What did you put it back in for? Get it out!"
            "Ahh, no can do. It's latched onto the inner cavity of your sinuses and to pull it out would be to cause your entire skull to collapse, so you'll just have to deal with it Ms. Pond."
            Another wave of horror crosses her face and she asks, "But what is it?"
            "That was an arthrocardicsynaptipod, more commonly known as the eavesdropper. It clamps itself to the roof of your mouth, then uses synaptic impulses to read your mind. They must've put it in while you were asleep."
            "You mean this thing has been in my mouth this whole time?"
            "Yup"
            "Then why the hell didn't I notice it? I can feel it in the back of my mouth right now, it's disgusting! How could I not notice that?"
            "A simple perception filter to keep you from knowing that there is a bug clamped to the roof of your mouth, because if there's a bug clamped to the roof of your mouth then what's the one thing you cannot stop thinking about? The fact that there is a bug clamped to the roof of your mouth! And if you are a bug clamped to the roof of one's mouth, reading their thoughts, and the one thing they keep thinking over and over is that there is a this great- big- slimy-" Ponds mouth begins to curl in disgust, "crawling- squirming- disgusting bug clamped to the roof of their mouth, then that drives a mind reading bug absolutely insane, now doesn't it?"
            "Doctor."
            "Yes?"
            "You're not helping."
            A grin spreads across his face. "Ah, but I am!"
            He grabs her hand and they're off!