The Impala is a graceful and fast animal that can jump amazingly high.  It needs these strengths because it has to contend with fierce preditors.  It is said that the markings on the rear legs and tail, when seen from behind, is the McDonald's arches for lions.  In this image, taken at 1/400 of a second, the male Impala (only the males have horns) is moving at an unworried pace and yet the right front leg is blurred by its motion.  Although most of the Impala in the herd we can across were grazing on the grass, it is clear from the scars on this one's face that it was eating the foliage of the thorn bushes.