Doonesbury by Garry Trudeau for September 22, 1971
B.D.: Hey, Weirdo! Stand forward! Well, Zonker, want to try your hand at carrying the ball?! Zonker: Negative, Captain America, sire! You're into a freaky power trip which I'm having a hard time digging. B.D.: What'd he just say? Football player: "No." Zonker: Far out.