Calvin and Hobbes by Bill Watterson for September 10, 1995
Calvin as Ultrasaur: The big stupid Ultrasaur takes a long drink...A very long drink! The ferocious Allosaur is thirsty too! This means confrontation! Ah heh heh.. Calvin: Fortunately this Allosaur is the patient type. Moe: Don't make me smack you across the hall, twerp.