Scenes where you watch and go: "Wow, he is EVIL"

Are there any movie scenes where a character, most likely the antagonist, does something so shocking, horrifying, or completely devoid of empathy that it leaves you stunned and questioning their humanity? It could be a brutal murder, a cold and emotionless decision, or an act so heartless it defies what normal people would find acceptable. For example, Amon Goth constructing the concentration camp and mercilessly killing the engineer who tried to explain an issue is a powerful display of such evil. Moments like these define the antagonist's character and leave an unforgettable impact on the audience.