Object shot across sky, then came to complete stop and began glowing, and growing in size,.

We were sitting on our front lawn, enjoying the early evening air, when suddenly a streak of light  appeared above us. It was a cigar shaped object and it came to a complete stop, hovering in the air. As it did so, it started to grow and mushroom in size, throbbing and glowing circles of light around it. First one circle of light, and then another like as if you throw a stone in a lake and there is a ripple effect all around the stone. This is how the light grew around the object. We were not able to fully observe as we were scared, and ran inside the house away from it.
We were both very well balanced people, never had taken any drugs at the time and entirely health concious vegetarians. Being so healthy inclined, we were not hallucinating.
Witness indicates that date of incident is approximate.  PD