'Disc-shaped craft' hovers over Colorado concert venue, employees say: 'It knew it was being watched'

A dozen employees said they watched a "large, disc-shaped craft" hover above a Colorado concert venue and then vanish. 

"What's even crazier is that as soon as we all started noticing it and stopped what we were doing to pay attention to it, the craft tipped at an angle and slowly started moving belly-first to the east," an employee reported to the National UFO Reporting Center about the June 5 sighting at the Red Rocks Ampitheatre in Morrison.

"Then it started fading away until it was invisible. It didn't shoot off into the distance. It simply dissolved into the ether. We all watched it vanish."

The "silent" hovering object was long – about the size of a "three-story office building" – with three levels of windows and lights, according to the National UFO Reporting Center.