High speed object zig-zagging down at a 170 Degree angle - Brookhaven direction

The sighting that I had was located on Long Island took place during the summer of 1954.  I was too young (about 7 1/2 years old at the time) to remember the exact month however, I know that it was warm because my parents took my sister and I to the local drive-in movie theater.  This theater was located in the town of Bridge Hampton.    Bridgehampton is located to the east of Brookhaven National Laboratory.  The orientation of the screen was so that the patrons of the theater were facing west towards Brookhaven.
The night was clear and warm with a spattering of stars in the sky.  The contrast between the screen and the night sky was stark.  The sky over the screen was jet black except for the stars.  I really don't have an idea of what time that it was however, I would have to say that it was probably between 9:30 and 10:00pm.  The object was only observed for less then a second however, it appeared as a Bright yellow white light (about as bright as the planet saturn).  The object moved straight down at a high rate of speed until it disappeared.  It was in a dive of about 170 degrees.  The object oscillated or zig-zagged down behind the movie screen.  The sighting was swift yet did give a clear image of the light and its rapidly zig-zagging movement.  The reason that I associate this sighting with Brookhaven is because it was definitely in the direction of Brookhaven or West Hampton that had a mmilitary airbase that is still in use.
Date is approximate.  Please see similar report from St. Louis, MO, for the same month.  PD