John Titor is an alleged time traveler from the year 2036. He claims to have come back in a car with time travel capabilities. He began posting on Internet message boards in November 2000 and for months he posted on various boards answering questions about time travel, giving warnings about wars that were to come in the future, and never breaking character. In March 2001 he stopped posting and went away -- possibly back to his own time/worldline.