I was leaving the school building after most other students were gone.
As I stepped out the front door, I heard a sound like an unmuffled outboard engine to my left, South.
I saw nothing, so I stepped down to the sidewalk for a better view.
There were no vehicles on the street.
The sound was coming toward me rapidly, and then I realized it was above the surface.
I was under large trees, so I went to the middle of the street where I could see straight up.
A disk of dull metallic color came into view.
It was travelling right up the street at approximately 100 mph.
There was a 1,000' overcast and it was about 200' below that.
I estimated it to be 40' in diameter.
I could see no propeller, control surfaces or landing gear.
As it was passing overhead, the noise got so loud that I put my hands over my ears, but it did not help at all.
I can now compare the noise to an unending stream of 50 caliber rounds passing close by.
At the time, I was 14 years old and had just started flying lessons.