Calvin and Hobbes by Bill Watterson for September 15, 1995
Calvin: Hobbes! Don't guard Rosalyn! I'm going to get her with this balloon! Rosalyn: The tiger is my prisoner! Calvin: I guess I'll just have to soak you BOTH then! HA HA HA! Rosalyn: Sorry, Calvin, I touched you with the baby sitter flag. Calvin: The baby sitter flag?? What's that? Rosalyn: It means you must obey the baby sitter...who says it's a half-hour past your bedtime now. Let's go in. Calvin: AWWWWW! Darn baby sitter flag.