Mystery Missile Flash & Explosion (update 12.11.10)
Now if we were to accept the proposition that the sunlight is hitting the contrail and the airplane from the top it sure created a brilliant reflection downward. Odd since reflected light usually bounces at an angle from what it hits rather than passing through a solid body like an airplane fuselage and bending downward, in basically the same direction it came from, as if it were passing through a prism.
Of course it is still one heck of a flash of light reflected off of a white-painted fuselage from sunlight striking it from below as sunset lighting is known to do.