I found this common example of mind retortion by Freemansons online..
THIS IS NOT THE REAL GANGSTALKING VICTIM
Testing "through my eyes" vision.
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This test requires that you NOT speak any words out loud, but only write them down or type them on a typewriter. You can use a computer but if the perps are using tempest, they can read every word on your computer screen. You can communicate with a friend by writing on a piece of paper the destination and activity the two of you agree upon. If the perps are there ahead of you, they probably can see through your eyes or read your thoughts.