I was a 12 year old kid in St. Monica's Catholic Grade School in Detroit. It was art class and I was sitting across from kid named Mark and we were supposed to be drawing each others faces. The tinny school announcement speaker came on and the principal, Sister Mary Edward announced gravely that the President had just been shot in Dallas.
There was a stunned silence and then Mark started to giggle, which in turn triggered a chain reaction of insane 12 year old idiotic giggling. The nun, Sister Mary Theonella went berserk, crying and screaming at the class to be quiet. But what could you expect? Things were never the same again.