Once the image goes start describing the new one. Describe as quickly as you can but stay with the present image. Take the changes of image to be a cue that you have described it enough because something triggered a change in image.
All the images are relevant. The later ones may just be giving you the same answer again in a different way. I've noticed the same "story told 3 different ways in an image stream but they all followed the same pattern. All you have is more cues and clues toward your answer when it comes to decoding. The early images are just as relevant.
Alex
