The Sideshow (1928)

Melrose's circus is being threatened by his competitor, who's angry that Melrose has outmanuevered him in bookings; what he doesn't know is that the competitor has also planted a saboteur who creates accidents in hopes of reducing the value of the circus. Meanwhile, he's also hired a beautiful young woman as the magician's assistant, with eyes toward more - but he realizes that, as a midget, she won't have him.