Moremi game reserve, Okavango Delta, Botswana 1995
Then suddenly they start the chase. Sorry about the poor quality of this image, I cropped this down from a much larger image. This was over 100 yards away and I was lucky to get even one clear shot, since the animals are running at full speed. For a cheetah, full speed is over 60 mph. The impala is running for his life, so he is going pretty fast too.