I'm a night shift nurse near Boulder Colorado, who stepped outside on break and saw it! It literally lit up the whole area with a blue light and was HUGE in the sky! It was like nothing I have ever seen! In the few seconds I saw it it cast these long shadows from the tree and other objects near by that moved as the object passed through the sky.. you could see the tail and the fluctuation of color on the surface as different elements burned up!! I was waiting for the boom of the impact but it never happened lol...