I was walking into a dark room when a REALLY bright, like laser bright fist sized point of whitish blue light streaked in an irregular pattern just below the ceiling and vanished. It stopped me dead in my tracks startling me, it was moving VERY fast and disappeared within a couple seconds. It didn't cast any light around it and I wasn't looking at the area it appeared when it happened. It did leave a brief streak behind it but didn't cast any light on the ceiling or around it. There were no storms in the area and no light coming in through the windows, which wouldn't have mattered because of it's size, ball shape and intense brightness. I've never seen anything like it before and haven't since. Here's a quick rundown of conditions surrounding the event: dark but not pitch dark room appeared above me where i wasn't looking fist sized and ball shaped intensely bright white/blue fast irregular pattern of movement lasted a couple seconds before vanishing completely didn't cast any light around it appeared suddenly and vanished abruptly no storms no other light sources other than ambient lighting from the next room behind me I have perfect 20/20 vision with no history of eye injury or vision problems. I don't think it was caused by something happening with my eyes because of it's size and intense brightness but I'm no optometrist. And the fact that I wasn't looking directly at it when it happened. I clearly saw it and it startled me and gave me goosebumps. I do not hold much faith in the paranormal, don't believe in ghosts or anything like that (which is why I'm asking here) and believe there should be a rational explanation for it but I can't think of any given the environmental circumstances in which it appeared. I don't claim to know everything about our universe or the nature of light so I'm not ruling out any possibilities. Maybe particles from the sun interacting somehow with things in the air? But i would think that reaction would be a tiny point of light, this thing was fist sized. I just don't know. Any ideas?