My fiancé and I were relaxing in the hot tub. About 5 minutes after we sat down in the water we were talking and out of no where with no warning a VERY bright beam of light hit the trees about 5 feet behind us and about 10 to 15 feet directly above us. I could see the light beam coming across the roof line of the house, but, all I could see was the beam from the peak of the house to the end of the beam of light, it was about as big around as a basket ball and it seemed to be focusing on the trees. The light went left and right about 4 feet in either direction and then went up the tree about 3 to 5 feet and then disappeared as quickly as it appeared. My fiancé could see the more of the beam because she was sitting facing the back of her house, and she said to me that the light beam seemed to go on for miles, but could not see where it started. There was no noise at all not even frogs or crickets or ambient noise. There was no way anyone could have used a light from street level as we are on the top of a hill, and the direction from where the light was coming was lower then the level of ground we were on.The whole incident lasted maybe 30 seconds.