I was outside smoking a cig' and saw a very bright light in the north east sky. It was moving very fast, with no apparent airplane or helicopter lights. The light stayed very bright and moved horizontally towards the north. I'd estimated the distance at five miles or so but it could have been much further. Although my mind doesn't want to believe it was any farther because the further away this object was, would suggest the faster it was going; much faster than any planes can fly. The size of the object would've been very large as well.

After about two minutes of tracking this thing my friend went inside to get a camera, when it all of a sudden blinked out. After about five seconds it blinked back on again at the same distance, estimated, that it would've traveled had it been visible the whole time. It blinked on and off two more times, a total of three, when it finally stayed off.

I was watching from a porch on a hill with two other witnesses. All of us had a very good and a large panoramic view of the skyline over the trees. There were two separate airplanes in different directions flying at the same time overhead. This was nothing unusual to me because we see them all of the time. I grew up on a military base and am very familiar with all types of aircraft. I am an amateur astronomer who knows what a satellite and a meteorite look like. This was a definite UFO in my book. Wish I'd had time to get a picture.

Source: MUFON
Edited for clarification