Wow, that's such a horrible move I would have walked on the spot. NEVER sign something under duress like that, although the fact it was at least somewhat under duress would likely help you in court.
The only time I ever interviewed with a company that wanted me to sign an NDA first they faxed or emailed me a copy at least a day ahead of the interview.
The only time I ever interviewed with a company that wanted me to sign an NDA first they faxed or emailed me a copy at least a day ahead of the interview.