Hergé returned to creating fictional nations as allusions to real countries in subsequent "Adventures", such as Syldavia and Borduria (based largely on Yugoslavia and Nazi Germany) in "King Ottokar's Sceptre" and Sondonesia (based on Indonesia) in "Flight 714 to Sydney". He also re-used other elements pioneered in "The Broken Ear" in his later "Adventures": a parrot in "The Castafiore Emerald", a ravine crash in "The Calculus Affair", a fireball and vivid dream in "The Seven Crystal Balls", and a firing squad in "Tintin and the Picaros". Tintin returned to San Theodores in "Tintin and the Picaros", in which the characters Pablo and Ridgewell also made a reappearance.