World war two military cargo plane. Similar to a jumbo jet huvering 15 feet above top of car. Silent with no jets or propeler on wings. Metalic army green in color.

About 5 years ago when I lived in Sac. My husband and I were driving down Florin Rd parallel Florin mall.  Are car was the first to stop at a red light.  As we waited for the light to change my husband told me to look out the drivers side window.  Both of us saw what appeared to be a World war 2 military cargo plane.  It was huvering  about 15 feet above the top of our car and slightly to the left.  The plane was a metallic army green color with no jets or propellers on the large wings.  As I started to panic, thinking that it was an air craft about to crash, my husband rolled down his window and told me to listen.  The craft made absolutly no sound.  I looked up at the cockpit window to see if there was a pilot, but the sun was reflecting of the window, and I couldn't see anyone.  The light turned green and we drove a block and a half to a Dennys restaurant, where my husband parked the car.  I got out and ran into the restaurant grabbing the first person in sight.  An elderly man exiting Dennys.  I asked if he could come with me out side.  I pointed the plane out to him, which had moved about a block away from where I first saw it, towards JC Pennys, at the Florin mall.  By this time it was about 30 feet higher than when I first saw it. It huverd there for a short time befor it slowly decended behind Pennys.  The man saw the plane making its decent.  I said to him "What is that?" as I pointed to the craft.  He stared at it for a few seconds, and replied "I do not know!" He turned and quickly ran to his car. When I first saw the plane it was huvering in one spot it then moved to the side gradually gaining altitude, huvering there for a few seconds, then slowly decended down like a helocopter would land.    I really need some sort of explanation on this matter.  If anyone has ever seen or hurd of anything remotly close to this incident, that day in Sacramento, or any where else please your info.