Some UFOs are easy to dismiss as stars, airplanes, or something else. But other incidents are just too eerie and unexplainable to brush off so easily.

Someone submitted a report of a UFO sighting to the National UFO Reporting Center, which occurred on Sunday, July 10, in Estes Park. They say 4 lights alternated in color from green to red, and back to green, hovering about 2,000 feet over a ridge 5 miles southwest of where the witness was located. The lights slowly moved sideways, up and down, away, and back again "somewhat erratically."

This incident lasted for about 15 to 20 minutes before the lights sped off to the west, where the witness could see them just above the horizon for another 15 minutes.

So what do you think this was? I've definitely never seen anything matching that description that might explain what the witness really saw.

To submit your own report to the National UFO Reporting Center, go HERE. (Jokes and hoaxes are ignored.)