King Ottokar's Sceptre: Part 2 - S2-E5
Other mistake: A museum curator notices that the leg of a dinosaur bone head been stolen after Snowy removed it. During this shot, the dinosaur's foot hasn't moved an inch. How can this be possible? Snowy managed to remove a dino leg with his teeth, so must have dislodged the rest of the bone while doing so. (00:26:55)
King Ottokar's Sceptre: Part 2 - S2-E5
Other mistake: When the singer starts singing in the car, there is one shot of a guy with an umbrella walking through rain. He walks through a puddle, but without causing a ripple. (00:25:55)
Chosen answer: It is a pill that makes alcohol taste disgusting.