We were stargazing just south of Denver and the motion and brightness caught my eye. Probably only saw the end of the event. It was very green. Never seen a meteor quite that color. Because of the color and the fact that it was so low in the glow from the city lights made me think that it could be a firework. But there wasn't a second one. I knew that if it was in fact a fireball it had to be exceptionally bright.
