Attendees witnessed a strange circular, colored light moving through the air at Colorado concert this past week. The light flashed and moved at odd angles.
Everything about that sentence makes you doubt anything happened other than a drug induced light display. BUT...
The video is pretty interesting. And you can see it here. There are more videos and picture on the Open Minds website, linked from Mufon. Head over and check em out they are pretty cool.
And the witness were several naval pilots, each with over 6 years of experience in helicopters, which makes them fairly credible witnesses for any UFO sighting.