14 August 1975 , 22-22:30 hours, the commander in the rest ' Army Aviation French Guiot sight and his wife from their balcony a UFO. The event took place between Step dell'Orso and pass dell'Arco (on the edge of the Vercors massif). The couple have made the sighting on their balcony all ' eighth floor The lady first sighted on top of the rocks of the Passo dell'Orso a very bright ball of light and very intense, by about an eighth of the apparent diameter of the Moon is situated at a height of about 2.5 Km The light that had issued a slightly tinted reddish and was not easily discernible contours. Here the testimony of the woman: "This ball, which came from a strong light of a yellow, continued to close safely to the ground until m'apparve huge. Notaries then that was slightly flattened above and below left and see the dark lines that appeared to the meridians, regularly divided. The object could vaguely resemble a Japanese Lamp paper or canvas. Could observe the phenomenon more than an hour . The globe illuminated the surroundings as in broad daylight and remained motionless for the entire time. So I could examine it with peace through the trees in front of my window. Then all of a sudden, the object began moving, it moved very slowly, parallel to the ground, in the direction of the hills located near Uriage . Rose more and I could still see through the clouds crossing. It is said that it was guided Because it seemed to go to a destination by following a precise trajectory straight. Should be the one and a half when I returned to bed without being able to sleep until morning when, after having spoken with some neighbors, who knew others had seen a great light but had not been lifted. ".
That day the sky was covered with clouds, the ratio was around 1000-1200 m altitude . Investigations of the leading investigators to believe that the UFO has made a vertical descent making a arm movement (or "drop dead leaf") to reach a distance from the ground of 30 m and 80 m from the point of observation. The observation of Mrs. Guiot was made without any change in color and with a cloudy background: she could indeed see that discensivo movement in the right part of ' unidentified flying object (more clear on the left side) seemed "diluisse" left behind if a strip light for several minutes.