large, bright disk shaped light, hovered then flashed off at a speed we or anybody on earth would be capable of.

i was on interstate 80 heading east, approaching lincoln,neb at 3:00am. i saw at about 10:00 and 30degrees a large bright disk shaped light hovering, it seemed to be 5-6 miles away.it hovered there for about 90-120 seconds, then it flashed off to the northeastat about a 30 degree angle. it was gone in lest than a second (today when i watch star trek  and the ship goes into warp drive, this is exactly what it looked like.) my 14 year son seated in the front seat said did you see what i saw?? both of us had seen the exact same thing.i have always wondered if others saw this, i went to roswell nm to see the where sightings were. i have noticed an inordinate amount of sightings near lincoln and omaha neb. i have heard people make fun of these sightings, but i will never forget or not beleive what i saw wasn't from "somewhere else".
Witness indicates that the date of the event is approximate.  PD