I saw an egg like object out of the side of my eye while driving, but it changed speed and shot away with no transition time.

I think it was in the afternoon and I was driving south with the airport to my right and saw something out of the corner of my eye in the area of the airport. I glanced at it, thinking nothing abnormal...because it was next to the airport.
 At first glance the shape seemed odd, but I wasn't really looking at it with my full attention. I was driving and it was off at an awkward angle. What I did notice, was it was going unusually slow and looked like a egg with about the same color and luster as a old pearl. It really caught my eye when it went from a sluggish pace to a very quick pace without any transition time. I would have stopped and looked, but I really was so surprised by it that I didn't even think to until I was out of the area.
 Date and time are both guesses. It was a long time ago, and I never even thought about reporting anything. Just happened accross a show on tv about mass sightings and the governments explanations. They were really stupid explanations so I went online to see what they were saying a flying egg was!
Witness indicates that the date of the incident is approximate.  PD