Jerry often says that Slam Bradley was really the forerunner of Superman, because we turned it out with no restrictions, complete freedom to do what we wanted; the only problem was that we had a deadline.

Clark Kent, I suppose, had a little bit of Harold Lloyd in him.

I think initially we wanted to use the first letter of the character's name. We thought S was perfect.

I drew a picture on the back of a calendar in pencil. In those days they used to give out free calendars, I had no art paper, so I took whatever else I could.

I had to produce a complete page - or two or three - in one day. I took a lot of pride in my work, and I hated to do a mediocre job. Evidently, some of the writers enjoyed my work best of all for that very reason.

In this drawing we just let our imagination run wild. We visualized Superman toys, games, and a radio show - that was before TV - and Superman movies. We even visualized Superman billboards. And it's all come true.

And I agreed the feeling of action as he was flying or jumping or leaping - a flowing cape would give it movement. It really helped, and it was very easy to draw.