We have another "boom," but this time with a sighting — a reader who wishes to remain unidentified says at about 8:31 PM Saturday night she witnessed something fall from the sky in a north direction and heard a big "boom":

I saw the object and a huge spark of light fall from the north side of Altadena.  I live on Royce and as i was watering my plants I looked up and witnessed the falling object and loud boom soon after, it happened so quickly. 

Anyone see or hear something similar?