Revealing mistake: When Tintin discovers that Rastapopoulos is on the island, Tintin's arm has been animated differently than his face. Tintin's arm appears visibly more tanned than his face is. (00:11:05)
Revealing mistake: When Carreidas tells Rastapopoulos that he is mad and Rastapopoulos replies "No, just well informed", Rastapopoulos begins to walk around Carreidas. As he is walking around Carreidas, the cigar in Rastapopoulos' mouth clips through the string in his monocle. (00:11:50)
Revealing mistake: After Rastapopoulos tells Tintin he should have stayed on Flight 714, he says all he wants is Carreidas' money. When he finishes the line, the cigar in his mouth literally flickers from the left side of his mouth, to the right side of his mouth without him moving it. (00:11:45)
Chosen answer: If Hector was seriously intent on removing King Ottokar's scepter from the glass cage holding it and launching it through the window with the camera, then Hector would have been forced to knock out the two guards so they would not have interfered with Hector's plan as soon as he removed the scepter from the glass. As for Hector, himself, was explained when Tintin was explaining how Hector stole the scepter. Tintin placed a twig inside the camera and it launched out of the camera. Hector would have placed the scepter inside of the camera, and would have been knocked unconscious due to the spring effect created when the scepter had been launched.
Casual Person