What British people say vs. what they really mean

This translation chart made me laugh out loud...
My dad is English, and when we were in high school, my sister asked him if she could drive into Detroit with her boyfriend to see a band. He said, "I'd rather you not." She went anyway. When he got mad later, she was confused: "But you never said I couldn't go; you said you'd rather I not, while I decided I'd rather."

P.S. British words that Americans use, and what English sounds like to foreigners.

(Via Today I Learned)