Sprayregen prefers speaking extemporaneously, even though he knows that's risky.
From the sacbee.com
Many seemed astonished that a President could think and talk extemporaneously.
From the time.com
Whenever I watched Bush speak extemporaneously, I'd feel embarrassed by and for him.
From the orlandosentinel.com
Reveles thanked the Bears before speaking extemporaneously to the crowd.
From the dailyherald.com
Embroidery and drawn work are done extemporaneously without any designs.
From the en.wikipedia.org
As an orator, Hamilton could speak extemporaneously for hours on end.
From the time.com
I recently had to cook extemporaneously, for an accomplished chef.
From the post-gazette.com
Throughout this campaign, Romney usually spoke extemporaneously and with only a few written notes.
From the washingtonpost.com
His ability to speak extemporaneously served King well many times, but none better than on Aug. 28, 1963.
From the stltoday.com
More examples
Without prior preparation; "he spoke extemporaneously"
Improvisation is the practice of acting, singing, talking and reacting, of making and creating, in the moment and in response to the stimulus of one's immediate environment and inner feelings. ...
(extemporaneous) composed, performed, or uttered on the spur of the moment; impromptu