Black Cyclone is a 1925 American silent Western film directed by Fred Jackman[1] featuring Rex the King of Wild Horses.

As described in a film magazine review,[2] Rex, a wild horse of the plains, pays court to The Lady, an aristocratic mare, but loses her when they meander into the valley where Joe Pangle holds reign with his herd of horses.

He is rescued when Jim Lawson aids the horse from the waters using his own hands.

Jane Logan is pursued by Pangle when Lawson takes after them on his horse.

Lawson's horse is shot, and Rex permits him to get on and ride.