You Never Know Women (1926)

Sinopsis: On her way to the theater, Vera, star of a Russian vaudeville troupe, is rescued from a falling girder by Eugene Foster, a wealthy broker who persists in his efforts to win the girl. Foster engages the troupe to perform at his home, and Vera, stunned by a fall, awakens to find Foster pleading his love, while Norodin, her partner who loves her, sees them embrace. Norodin, who performs an underwater stunt, asks Vera not to be present for his act and causes her to believe him dead; heartbroken, Vera tells Foster of her mistake; and enraged, he attempts to seize her. The magician appears, pins Foster to the wall with knives, and advises him to leave before the last blade is thrown.