Falling blue sphere.I was sitting facing the back opposite of my friends. They were all talking and I happened to look up, and at that moment, this bright deep blue and very defined sphere was falling very quickly from the sky, leaving a bright blue trail behind it. It took me a second to register what I was seeing. I thought maybe a falling star or meteor, but I'd seen lots of those, and none of them looked close to this. By the time I realized this was a ufo and started to yell for my friends to turn around, it had fallen completely, and away from view. We looked into it and searched for images of lightning balls, meteors, limbs, etc., but nothing came even close to what I saw. Very confused.