While driving South on the 605 frwy at approx. 7:30pm my daughter and I observed 2 very distinct flashes of light in the sky as a plane passed at the right of the flashes and a much higher altitude. No object observed but the flashes of light were none this 56 year old man has ever observed. The 2 flashes were rectangular in shape and the size of a small fist in the windshield. 3 inches wide by 2 inches tall, picture that size rectangle and draw clovers around it and that is what the shape of the flashes appeared to be in the windshield at a distance of about 100 yards. The flashes were very unigue and extremely bright and very fast and then nothing in the sky, a plane flew by at a much higher altitude and towards the west of the 2 flashes. My daughter and I both expelled the term “Whoa!” at the same moment as the flashes appeared, we scowered the sky but could not locate any near objects except for a distant plane.