MassVision

A mass vision is a phenomenon in which a large group of people, usually in physical proximity to each other, all experience the same unexplained phenomena simultaneously. It is similar but not identical to the Folie à deux phenomenon.

Famous mass visions: List of UFO sightings; The Miracle of the Sun -where 70,000 pilgrims at Fatima in Portugal in 1917 saw the Sun "tear itsef from the heavens and come crashing down upon the multitude".

http://en.wikipedia.org/w/index.php?title=Mass_vision&redirect=no