Calvin and Hobbes by Bill Watterson for September 27, 1988
Calvin: Is the martian still out there? Hobbes: I'll take a peek. I don't see him. He must have hidden. Calvin: Hidden?? Do you think he's scared of us? Hobbes: Why not? We're scared of him. Calvin: Yeah, but we're just ordinary earthlings, not weirdos from another planet, like he is.