Absolutely. I've had it happen. I have even undergone tests that shows I experience performance anxiety, and that it actually goes up the easier a question is.

Absolutely. I've had it happen. I have even undergone tests that shows I experience performance anxiety, and that it actually goes up the easier a question is. I've had interview instances where my face felt flushed and my mind completely blank on a question I knew how to do but struggled on. And then 30 minutes after the interview finished, the answer is clear as day in my head because it was indeed something I knew and the anxiety was gone. I feel there is a fair amount of discrimination against those of us who experience anxiety like this, but in a way, I don't care all that much because places that interview certain ways aren't places I want to work anyway.