Large Green Barrel shaped Light

While walking my dog I looked southward down the street and saw, at an altitude of roughly 8-10,000 feet, a large green colored barrel shaped light fall at a incredible speed. It was much faster than terminal velocity and from my position in the Northern most part of Vancouver Washington, it appeared as if the object was at least as far south as Portland Oregon. I would guess that the object was at least same size as a Boeing 747 given it's relative size to it probable distance from myself.