Cigars of the Pharaoh: Part 2 - S1-E7
Other mistake: After Tintin and Snowy run out of the Major's house and into a forest, they both step over a puddle, yet water splashes as if they did walk through a puddle. (00:30:55)
Cigars of the Pharaoh: Part 2 - S1-E7
Other mistake: Tintin had nothing to cover himself from the rain in the forest with. However, he is totally dry in the morning even though it was pouring it down the previous night. (00:31:10)
Chosen answer: It is a pill that makes alcohol taste disgusting.