Calvin and Hobbes by Bill Watterson for January 13, 1990
Calvin: C'mon, Hobbes. We'd better go find my duplicate before he gets me in trouble. I'm telling you, lady, you've got the wrong guy! I'm a duplicate of Calvin! Calvin's in his room! Mom: We'll see about that. Give me your coat. See, Calvin? There's no one here. Now that's enough games. Clean your room, ok? Calvin: Calvin? I don't see him, Hobbes. Maybe he's outside, huh? Hobbes: We'd better hurry. I think I hear your mom coming down the stairs.