Calvin and Hobbes by Bill Watterson for October 25, 1990
Transcript:
Calvin: Well, if it isn't ol' rocket-butt! I guess you won't be pouncing on me anymore! See, I'm wearing a mask on the back of my head! Now you can't tell which way I'm facing, so you can't sneak up from behind! I've finally thwarted your murderous recreation! Maybe this will teach you that people are smarter than animals! You can't outwit a human! Ho fair! You didn't even sneak up!
Hobbes’ face in the third panel