A spherical light moved at an alarmingly fast speed, stopped and hovered, and moved again and left.There was a spherical light that moved rapidly, stopped, and moved again. I turned to an associate to tell him to look but by the time I turned back it was gone. The was that it moved and then stopped midair was what I found so alarming. I couldn't guess the altitude, but it didn't move like any aircraft I've seen, except perhaps a harrier jet, with it's ability to hover.((NUFORC Note: Witness indicates that the date of the sighting in 2006 is approximate. PD))