a blueish doughnut shape light suddenly appear and come down at me then suddenly disappear in a flashI was standing outside on back patio deck staring South off what I was certain was the Big Dipper. While fixated on the sky an unusual circle of light appeared and came right at me. The light was blueish in color and hollow in the middle like the shape of a doughnut. At first I thought it was a falling star or a meteor coming right at me. The light became about the size of a vollyball before vanishing right before my eyes. This happened all in about 7-8 seconds that I could account for. I wasn't sure if what happened was really happening. I told my wife about it 2 days later because it has troubled me since.