I was driving home one night from the city, and saw this green light go across the road ahead of me. So I slammed on my brakes, pointed my car down into the ditch, turned on the high beams, and got out, yelling down into the ditch. Only thing I could think of was someone went off the road into the ditch. Well there was a lot of gravel on the side of the road, and it was really dusty down there. I kept hollering down there, and when the dust cleared, there was nothing. Needless to say, I hopped back into my car, and sped the rest of the way home, with the car doors locked.