Have you ever stood in front of a mirror, and tried to see your eyes as merely geletinous, moist orbs? Like, without meaning, like you might look into the lens of a camera without seeing meaning in its glass?
It’s quite hard to do and kind of unpleasant (I didn’t sustain it for more than a fraction of a second) – but it gives you a peek at something. I put a picture here to give a vague impression of it.
The picture is pretty mild, but trying in front of a mirror is pretty strong stuff to try. It shows how close some strong stuff is, in our mundane everyday lives.
And no, I don’t recommend it for cheap thrills. Do it with a mind to form a conclusion at some point, don’t just do it to titilate your sense of horror or whatever. Of course reality will seem pointless if you go into it without a damn point in mind.