Strange Perspective Photos
This is, in fact, not a picture of a giant balloon or a tiny person. These kinds of photos have been a popular style of photography since photography was conceived. Although you personally know that this is merely a trick of perspective, your brain struggles to maintain that perspective of reality.
Your Brain Doesn't Get It
The reason that these photos are so compelling is that, psychologically, your brain doesn't technically know how to process the image. Your brain operates on a scale of fixed perspectives, so your immediate reaction will almost always be confusion, whether you've conditioned yourself to react that way or not.