I was driving in my car when it appeared in the sky. At first I thought it was fireworks then realized it wasn't. I was only a minute or two from my home and asked my husband if he heard fireworks and he said no. It was just that one burst across the sky headed downwards a very pale green large burst then immediate quickly trailing down in a slight curve in the lower middlepart of the sky. We live away from large city in country and sky was quite clear of clouds with the moon being the only light until this bright burst.