I don't have any reference frame to rest on, but, by the sound of it, it's something I experienced that I attributed to "entity leaving/escaping"... there is a Frequency War going on and this could be an ELF perception akin to earthquake waves.Posted by Bill Ryan (here)
Something odd just happened. I was sitting at my disk, head absolutely totally 100% still. (My chin was resting on my hand.) Suddenly, I was hit by a strong wave of dizziness, a lot more than before. I'm certain nothing in my inner ear was physically moved at all.
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This link links to a witness account at the beginning of the video which supports the claim that counter frequencies are effective against parasites of a different kind.