"My very first day, we were doing a huge practical effect, a flying effect. It was going to be me and Gene Hackman. Okay, first of all, that’s incredibly cool. But we were in a ’30s-style open-top roadster and, basically, Superman—played by Christopher Reeve, also amazingly cool—flies underneath the car, and he would fly away with it. Nowadays they would do that with green screen. You’d be lucky if you ever actually even got in the car. But at the time, they did it practical. So they literally got one of those huge construction cranes that are usually on the top of buildings, and lifted this convertible 40, 50 feet in the air, with Christopher Reeve wired underneath it in full Superman outfit. Did I say “outfit”? I’m apparently from the 1950s. [Laughs.]"
January 1, 1970
https://en.wikiquote.org/wiki/Special_effect