At dusk, we saw a saucer-shaped object that hovered silently for 5 minutes, then darted out of sight

UFO's were in the news.  I was about 8.  My dad (a policeman) was driving us (Mom, my 12 year old brother, me, and a family friend) home from Merritt beach.  We stopped the car to drop off our friend on 42nd and I street, across from the old Shortstop Cafe.  It was dusk.
 My brother and I looked up and saw a saucer-shaped object with a dome on top, about 100 feet in diameter, lights around the edges. It was probably 200 feet above the maple tree in our friend's yard.  My brother told my dad, who proceeded to yell to everyone in the neighborhood.  This was in the early 60's before air conditioning was prevalent, so many people had the solid exterior doors open and heard him through their screen doors.
 Most of the neighborhood reacted to my dad's yelling about seeing a flying saucer by coming out and seeing for themselves.  It made no sound.  All we heard was the rustling of the leaves in the tree, and the oh-my-god's of the people.  It hovered quietly for seemed like an eternity - probably 5 minutes or so.  It then dashed southeast probably a half-mile or so within a couple of seconds max, then zig-zagged out of view.  Dad had a camera in the glove compartment of the car, but chose not to take pictures of the UFO, in fears that the police force would not look favorably on it (I guess there had been reports that had been refuted and reputations consequently questioned).
 No one can convince me that I did not see a UFO that evening.  It was not an airplane,  helicopter or weather balloon.
Witness indicates that date is approximate.  PD