I have been doing some casual research into John Titor, who claimed to be a real life time traveler. He posted on online message boards back in 2000 and then headed back to his home in the year 2036. He is a common subject on sites devoted to conspiracy theories and unexplained phenomenon and many fanatics believe that he left clues for us that predicted disasters such as the attacks of September 11th 2001.
On the message boards, John provided links to lectures on Kerr Black Holes. A Kerr Black Hole has a rotating singularity and two event horizons. The outer event horizon marks the boundary within which an observer cannot resist being pulled along with with warping space-time. The inner event horizon marks the boundary from within which an observer cannot escape. The volume between the event horizons is known as the ergosphere.
When investigating the fringe, feel free to go beyond mere curiosity, but put the retrorockets on full if you feel yourself creeping dangerously close to Belief.
Keep it in the ergosphere.