Mysterious single bright light flashes over West Michigan.At approximately 23:00, on the night of 7/25/2015, members of my family and I were on the front porch of our home. I was seated in such a way that I could see a large area of the night sky. Suddenly, as I watched a satellite passing in a northerly direction, there was a large, bright flash in the total darkness of the sky. I commented on it, and it happened again about five seconds later. At that time, three of my sons came off of the porch and proceeded to watch the sky where I indicated. Almost immediately, there was another bright flash which was followed again by a bright flash approximately fifteen seconds later. There were a total of four flashes, with me seeing all four, and my sons seeing two of them.The light appeared to be uniformly round, very bright in comparison to the surrounding stars, and somewhat larger than the largest, brightest stars or planets that we customarily see in the night sky. The object seemed to have moved a distance equivalent to holding a dollar bill sideways at arm's length (approximately 2 to 2 1/2 inches). There were no aircraft in the immediate vicinity, and the light did not flash or pulse like those of any aircraft that I have ever seen. Simply put, what we saw was a light which appeared out of nowhere, flashed brightly four times in no apparent pattern, and stopped flashing.We have watched satellites and aircraft in the night sky for years, and none of us has ever seen anything like what we witnessed last night. The light was spotted at approximately 75 degrees, directly north from our position.