a light blue rigid disk object with dome decended in an out of control, flip floping pattern about a mile from my point of view.

Approximately 1,000 feet u and maybe as much as one and a half miles distance from me I observed a light blue disk (classic saucer with small dome in the middle) falling somewhat out of control.  I would best describe it's falling pattern as zig zagging as though it was made of an ultra light material being affected by the weight of air.  
It clearly had a distinct rigid fo with a dome in the center.  It had to have been at least 30 feet in diameter and mayb to 10 feet in height.  I observed it flipping and falling for about half a minute before it disappeared behind the horizon of pine trees about half a mile or more away.  I believe I was facing west as I was walking north on the highway.  
My taxi had just broke down and my fair was walking down the same road ahead of me.  I don't believe they observed what I saw.
Witness indicates that the date of the sighting is approximate.  PD