Size of Object(s): 2 football fields in diameter
Distance to Object(s): mile high and was still before it disappeared

Appearance / Description of Object(s)
unshiney black sphere with flashing yellow lights every 20 feet

Description of Area / Surroundings
Urban area in a school yard

Full Description & Details
The UFO wasn't a disk like it usually is in the movies. It was a huge black spherical mass that flashed bright blue in a hexagonal pattern and then dissaperared like it went into a warp hole.

Can sighting be explained as any conventional man-made or natural object?
no

Personal Background
students

Views on UFOs, before and after sighting
didn't think they existed

Reported Sighting? No