An article at About’s Paranormal section on Spontaneous Human Invisibility.

It has a few links I wanted to save, including one to a woman named Donna Higbee who supposedly studies this phenomenon.

Another is a page describing exercises designed to induce invisibility in objects, and yourself. Another page which describes a way to make an “invisibility paint.”

Also, it relates a story which I had once heard attributed to Nikola Tesla, although they don’t mention him here by name:

There is an unconfirmed story of a man who achieved invisibility through the use of his self-invented Electro-Helmet in 1934. Before witnesses, the story goes, he placed the helmet on his head, stepped into a cabinet and touched some “contact gloves” above his head. When an electric current was switched on, he gradually became invisible, from toe to head. The young scientist’s body could be felt through touch, it is said, but not seen.