UFO Sighting in Châteauguay, Quebec on September 30th 1977 – Came over school yard made a turn and took off at abnormal speed

The school bell had just rang. I was making my way from the yard to the school. For an unknown reason, I looked up and observed a large object coming over the trees from the north west. I can attempt to describe it. It was two Chinese woks on top of each other separated by a type of slotted metallic structure. It had to be at least 12 to 15 meters across and made no sound.The under belly had a burnt look to it as if someone took a blow torch to it. The object changed its coarse westward and climbed at an incredible speed. In school, at least four other kids saw it as well.