Surprise Lisp.
/Freshman year of high school, I was super nervous about meeting new friends.
At lunchtime, I introduced myself to a cute boy.
I said "Hey I'm Kristen" and, instead of introducing himself to me, he mocked me by saying, "You're Krithten?"
I didn't even know I had a lisp until that moment.
Now I am acutely aware of and very self conscious of the way I sound when I talk.
Maybe that's why I don't talk often.