This illusion is really scary. For a few seconds you would not be able to believe your eyes and you will think that it is a modified image. But let us tell you that this is a real image. There is nothing edited in it. It looks believable because the man who is bending is wearing pants that match with the color of blazer the other guy is wearing. If you take your eyes from the upper portion of the photo and look at the bottom, you will find another leg which belongs to the man standing behind. That's the truth behind this illusion. They are actually two people. The positioning and the camera angle is responsible for what you are perceiving.