Raising a Serial Killer

Me, my wife and my 3 year old son were sitting in the food court at Costco. There is another family with a ~4-5 year old girl sitting behind us. My son looks at me and says “Do you see that girl over there…..I’m going to teach her a lesson.”

So I am taken aback for a second then I think he must intend to teach her numbers or some other normal thing you teach people. So I ask what he is going to teach her. His response: “I’m going to teach her to drown.”