The comment about going as slowly as you like in the description process didn't feel right.
The Fast Finish for both Image Streaming and Over the Wall (Genius Code page 45 left colum) says "Rapid speed in describing what you observe in your answer space is also essential in this process."
However, when you are doing it with someone when you take a breath, they begin, so I'm sure you are suppose to breath freely enough not to be exhaused.
Just talking fast enough to outdistance your internal editor, that seems to be the reason for talking rapidly.
CarolR