Found this Superman: The Movie behind-the-scenes image over at AICN, as its their "pic of the day."
What a pic!
This image features Christopher Reeve during the earthquake scene taking off, with Jimmy Olsen (Marc McLure) and Richard Donner looking on.
Speaking of Superman: The Movie, the anthology Blue Ray edition becomes available this Tuesday, June 7th, with loads of extra goodies. Amazon has it for under ninety bucks.