The best fireball I ever saw was 20 years ago while driving at night in the Middle Of Nowhere, Arizona...it was about as bright as a full moon, and green. Lasted about 10 seconds.
I saw one that was a sort of cobalt blue flaring to white then appearing to explode once, that appeared to have fallen straight down from my perspective. Not during a meteor shower, a fluke that I even saw it at all. It was early basketball season, I mentioned it online, nobody else saw it. A lot of joking that it was a harbinger of Carolina’s basketball season, as they’d had a surprising loss to an obscure opponent that night.
Same exact thing happened to me last year in New Mexico. The whole desert lit up as bright as an atom homb going off...green... leaving a sparkling trail. They said it was seen all the way up in Colorado.