Fireball object with long, flowing tailYellowish orange fireball with tail appearing like a comet streaking across the west to south sky. After a few minutes, it appeared to drop straight down, and the tail become longer and brighter. At one point, the object stopped, and the tail disappeared while the object just hovered for a minute or two, before resuming the drop and the tail resumed. It was just like pictures of a comet, however, this was at pre-dusk with lots of light and weather was clear and no clouds were in the area.There was no noise, no planes in area, or jets from military base located 110 miles southwest of this location. There was no mention in local news, newspaper, radio, or t.v., etc. There was no background interference as this was in the sky above the horizon (no trees, wires, homes, etc) and no other visible object(s) in the sky in the area of this sighting.((NUFORC Note: We wonder whether the sighting could possibly be ascribed to the illuminated contrail behind a high-flying jet aircraft. We have received many such reports, and many east-west air routes are over this part of Montana. Just a surmise, on our part. PD))