She would have been better off saying, "I have no idea!"
I only feel a little sorry for her, mostly because it's getting so so so much attention. I can't imagine that poor girl returning to school! Going to be rough.
I think the thing that makes me not feel too bad is how she handled it afterward. She got a little defensive and made excuses, instead of saying look, I was really nervous and my nervousness took over, I apologize, what I said made no sense at all and I'm so embarrassed! Laughing at yourself and admitting when you do something stupid will make it a lot more difficult for people to point and laugh.