Tintin in Tibet: Part 1 - S2-E6
Revealing mistake: The shot after Tintin says "We can't give up now" shows Tintin, Haddock and the Sherpas hiking through a dry hill. Over the first hill is a part of the ground that is black. As the shot continues, an extra part of black ground instantly appears from nowhere, as if the animators forgot to draw the black ground during the first half of shot. (00:11:55)
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