Calvin and Hobbes by Bill Watterson for May 23, 1992
Calvin: Say, I've got an idea! Hobbes: For your story? Calvin: No, I though of a way I won't have to write one! Hobbes: Oh no. Calvin: Hop in the time machine, Hobbes! We're going a few hours into the future! I'll have finished my story by then, so we'll just pick it up and bring it back to the present! That way, I won't have to write it! Hobbes: Something doesn't make sense here, and I think it's me sitting in this box. Calvin: Relax! We'll be back as soon as we go.