Silver cylinder, reflecting sun and with a strong silver flash before to disapear.First of all sorry for my english. My wife and I were in our car, 40 km from Paris, going to Normandy (on highway). I was driving quite slowly when my wife saw and pointed a static cylinder near clouds on the left side of the highway. It was very bright (sliver), apparently reflecting the sun like an airplane could do but with no wings, no sound, just like a metallic cylinder shape... The sky was perfectly clear with just some clouds in one spot (the cylinder was very near from that spot).We were watching "that," and suddenly a very very very bright light like under a spotlight much more brighter than the sun appeared during perhaps 5 or 10 seconds.After that, he disapeared like a gun bullet.. a condensation trail appeared slowly and after 2 minuts a beautifull clouds appeared where was the cylinder and got stuck with the others clouds just near. It was a very beautiful scene. Very peaceful.I'm 45 years old, my wife is 37 and early pregnant at that time.