Close encounter five adult witness

This is as reported to me through my granmother who is 95 years of age,and not a liar. Craft was smooth silver metalic with no doors 30 feet in diameter, perhaps 15 to 20 feet high. A row of lights changing in alternate from orange to blue, coming out of what appeared to be those translucent glass building blocks of the common type 4 to 6 inches square. She was walking towards the craft thinking someone had moored their boat a her dock. The closer she got she is saying to herself strange boat, no railing no deck, she was trying to look through these glas lighted windows when she called out to her husband "Carl" it immediately went straight up in the air scielently not leaving any ripples on the water and zoomed away behind an island. With three things traveling at great speed right behind it these three craft made a whoosing sound and made her duck down for fear of being hit.Also she cannot say much about these 3 ships as they traveled so fast.
These objects were seen by her husband two next door neighbours and a friend they were on their way to bingo. One of the women said don't tell anyone they will think we are crazy. The year not pefic in her mind but she did report it to the local newspaper. The reeds at the end of the bay 100 yards away were pushed down in 3 circular patterns the next mornings investigation.
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The party who submitted this report also provided a lengthy audio interview of his grandmother about the sighting.  It is an excellent description of her sighting of the object described above, and we share the writer's assessment of the veracity of the witness's testimony.  She describes the event in a very matter-of-fact manner.  She estimates that she may have been within six feet of the peculiar object. 
We express our sincere gratitude to the witness, and to her grandson, who submitted the report, for sharing the information with our Center!  PD))