Several years ago i saw an object the was a little larger than a golf ball with a tail that was approximately 2 feet long. this object was perfectly cylindrical with a tail. i was driving approximately 80 mph on interstate i-80 in nebraska as i was crossing the platte river near ashland, ne. the object was on a strait line path from east to west. i researched the possibility of serval different possibilities and was unable to come up with any explanation for the event.