1. Jim, who gave a lively impromptu speech after chairman, Hugh Jamieson had presented him with his award, was in typically dismissive mood about his own talents. BNC
2. But you are concerned with precise and meaningful writing where the more relaxed habits of impromptu speech cannot be allowed to creep in. BNC
3. At the Harris, Harris and Overdene Christmas party three years ago he had made what some considered to be the funniest impromptu speech anyone had ever heard inside the office. BNC