Racist Whiplash
When you are having a lovely conversation with someone who couldn't possibly be racist about a topic that couldn't possibly go there, when suddenly, racism.
"That girl was the biggest vegan hippie I ever met. One minute she was talking about loving everyone, and how she found Buddhism. Suddenly she was telling us how the Mexicans don't show any respect and need to learn English. It gave me Racist Whiplash."