Early in the am, 3 of us ( young men, late teens) were driving east bound over blankenship bridge. we stopped to admire the stars as it was a moonless/cloudless sky. we recognized a light hovering to the east over the area that would be west glacier. we began to watch, and when the light descended to its lowest position, a bean emitted very quickly almost split second towards the earth. the light gained altitude, just higher than desert mountain and continued south towards the bob marshall wilderness when we least sight.