Sounds like a meteor. They are common
If it had green colour to it means it's possible that it had some copper in it.
orange/yellow (sodium); yellow (iron); blue/green (copper); purple (potassium); and red (silicate)
The best one ever video captured is known as the Peekskill meteor. Here is a site devoted to all 16 video's of it.
http://fireball.meteorite.free.fr/me...eekskill/video