I was walking home at around 10 p.M. i noticed a light source almost directly above me. what i saw was a moving, glowing snake-like thing that was moving like an earthworm moves when they are agitated. i would estimate that it was higher than 500 feet directly above me. it emitted a whitish-blue glowing light. i reached into my pocket to grab my phone to video this thing but unfortunately as i brought my phone up and started pointing it towards the sky the object literally just vanished in a matter of seconds. the whole experience lasted maybe 45 seconds. the experience really kind of blew me away because i'm a very rational science minded person but i am one hundred percent sure of what i saw although i can find no explanation for it.