"Sean Murphy was looking at sets of faces for one of his experiments when he observed something really freaky. Skimming fairly rapidly through pictures of two faces side-by-side, Murphy started noticing that some of the people he had pictures of had grotesque and deformed faces. But when he looked at the pictures again, this time individually, they all looked normal."
Murphy, who undoubtedly possesses a strong stomach and an unbelievable resistance to nightmares, decided to look into the illusion further with the help of his colleagues Jason Tangen and Matthew Thompson. The three called it the “Flashed Face Distortion Effect”.
Watch the video below and follow the instructions to make your brain creep you out.