Diffee then showed a short film he made, "Being Bob," in which Bob Mankoff rejects every cartoon he's shown, then rejects every sandwich offered for lunch, then rejects a cab, and then, years later, has a successful transplant operation, if... his body doesn't reject it. Mankoff had some fun there obviously.
A question about the caption contest led Diffee to describe the process. He said the contest lets the magazine accept and reject the cartoon at the same time. They get about 9000 submissions for the contest. His first cartoon they bought for the contest was a boa constrictor wrapped around a man's date - his caption (or a reasonable facsimile submission) was chosen as a runner-up. Another time his caption did win.
A child asked him if he was frustrated - he replied that he's been drawing cartoons for them for 7 years. The first 2 years he was paying his dues, but the 3rd year he was frustrated. Now he recommends just being cynical as easier on everyone.
He had to leave for another event, but even so he was personalizing each book with a cartoon as you can see here. The Washington Post should cover this later in the week since Peter Carlson and a photographer were present. It'll be much better written and more interesting then, so I'll link to it.
The bird and the poop are added to the title page's facing drawing.
The man with the rejection stamp is drawn anew.
And mine - Duck!