After university I got to work at NPS "Lysychansk" (oil pumping station) in the mechanical and technological service for the position of master on repair of technological installations. My immediate boss was Vladimir Nikolayevich Silkovy (the name is such), a man with a great sense of humor and mechanical engineer.
Nikolayich (as he was called by all the slider workers) had a severe vision defect, specifically - myopia (myopia), which made him wear glasses with very thick glasses. We called them “high pressure glasses.” Nikolayich was very embarrassed to wear these glasses, but without them he really saw nothing! Thus e. He did not distinguish faces, and most importantly, reacted only to movement (almost like a dinosaur :)).
I saw it once in my own eyes. We were sitting in the smoking room with the slugs, smoking, and here someone notices Nicholas, who is heading to us. Everyone quickly silenced and freezed. Well, I am showing my fist - say, stand still, be silent and don't move!
Nikolaich goes into the smoking room, looks carefully, squeezing (and he was without glasses) and gives out: "Damn... there is no one... Where are the people?" I barely held back to not hang out in the whole voice. Nicholas did not really see us. I realized that this has happened several times.
After a while, Vladimir Nikolaevich decided to do laser vision correction. Few people knew about this (and I learned at all by chance: I met him at the train station, buying a ticket to Kiev - to make a correction on the weekend). In general, Nikolaich did a vision correction, came to work on Monday and immediately went to the smoking room. I was sitting there, waiting for the reaction of the working people :)
Everyone saw the suitable Nikolaich, quickly froze, silenced. They sit and wait until he turns and leaves. Nikolayich approached, made a surprised face and began to look closely at the people. Then he said, “Are you blasphemous, how did the fools disperse here?“”
Without moving, the instrumentarist asked, "Nikolaich, and you, what, do you see us?"
Nikolai said loudly, “Of course, shit! Your magic no longer works. March to work invisible people!”