Human Spontaneous Involuntary Invisibility allegedly happens on a regular basis to many people around the world. In all cases the person is still physically present but cannot be seen or heard. The world appears perfectly normal to the invisible person, who doesn't normally realise at first that they are invisible.

One case from Ventura, California details how a housewife became invisible while sitting on her living room sofa. Her husband began to search the house looking for her but could not see her. This lasted ten minutes before she became visible again, her husband was quite upset and thought she had been hiding.

Human invisibility has been written about for centuries. Ancient Magicians believed that it was possible to become invisible and used herbs and rituals to obtain it. In India students of Raja Yoga were taught that supernatural powers were a natural outcome of self-development. One of the Yogic Siddhas was indeed human invisibility.

At the forefront of this research is US based Donna Higbee. Since 1994 she has collected thousands of reports of invisibility from Europe, Australia, Puerto Rico and Brazil. She believes that we are tapping to an ancient power.