Rocky VII: Adrian's Revenge is a fictional film in the Rocky film series. In the episode Lemon of Troy as Bart is running away from some Shelbyville punks, he suddenly and mistakenly runs into a tiger cage, and he needs to exit through door 7 in order to get out (the sign on the entrance says "Caution: exit through door 7 only. All other rooms contain man-eating tigers."), but notices that the doors have Roman numerals on them, and Bart exclaims to himself: "Roman numerals? They never even tried to teach us that in school." And naturally Bart escapes just as the kids enter the tiger cage.