I was standing on the patio with about ten other people (at least half of them witnessed the event), when what I initially thought was a “shooting star” suddenly speeding from the right side of the sky to the left. This object left a huge bright green and red trail in its wake as it arced so far that it DISAPPEARED behind a building on my far left, without showing signs of fading (more than 5 seconds). I initially believed it to be a wayward pyrotechnic device but discarded the idea because the object was obviously extra-terrestrial (meteor?)