"I hope you have a heart attack!"
/When I was 13, I stole some Halloween candy from the bowl before trick-or-treaters showed up, even though my mom told me not to. She found out and became very angry and told me I'd get diabetes.
She sent me to my room, and as I was walking up the stairs, she yelled, "I hope you have a heart attack! And you can sit in your room and rot."
I've never forgotten that.