Back in '94 I was supporting a development team and one of my users came to me "I typed ci instead of vi. It asked me a question and I said yes and now my file

Back in '94 I was supporting a development team and one of my users came to me "I typed ci instead of vi. It asked me a question and I said yes and now my file is gone." I told her "Don't panic, I know exactly what happened and how to fix it." edit: typo