Racing Pronghorn Antelope

Racing at top speed across the Western plains, as close to flying as four hooves can take it, Pronghorn Antelope in motion are a marvel, running nearly 95 kph, faster than anything else on the continent. The pronghorn runs as fast as it does because they are being chased by ghosts ... the ghosts of predators past.
[these pronghorn were running before the decision to follow them and as fast as they appear, they were only going at half their top speed, which they can maintain over long distances for close to half and hour]