She performed with the Barnum & Bailey Circus for a season, performing in France and then the United States. Her 8 April 1880 debut in New York "was in every way successful, and received fervid applause," according to the "Clipper". Though she was best known as a human cannonball, Richter continued to perform other aerial acts, like the high dive and trapeze. She returned to Europe with Farini in November 1881, stayed a short time, and returned to the United States in 1882, touring with John B. Doris's Inter-Ocean Show. Richter married George Oscar Starr, who worked as a press agent for Barnum; and, together, they took some time away from the circus. Among other activities, they launched the Starr Opera Company in 1886. They intended it to be accessible to a popular audience, and even staged a concert for people incarcerated at Michigan State Prison. Though she was not previously known for singing, it had been reported that she sang a song called "It Is So Easy" after certain circus performances. She played various parts in comic opera, including a performances as Regina in "La princesse de Trébizonde" and Eliza in "Billee Taylor, or The Reward of Virtue". According to the "Clipper", she "showed that she had not only an excellent voice, but the grace and action which only long experience and study can give the artist." When George Starr was offered a position as managing director of Barnum & Bailey, she decided to reenter circus life. She also began using her expertise to educate the public and public safety workers about the usefulness and potential of safety nets, for example to catch people jumping out of burning buildings. Dressed in normal clothing, including jewellery and a hat, she would throw herself out of a building window into a net. An 1892 edition of "The West Australian" describes one such exhibition: "There was never a more fearless woman gymnast than this Zazel, who jumped nonchalantly from a fourth storey window into a net to illustrate the possibilities of the net as a means of saving life. She tied a stout cord about her skirts, and throwing her head up and backward, she sprang to the centre of the net as confidently and as gracefully as my lady springs from her carriage." She volunteered her time to advocate for the use of nets as life-saving tools for several years. In addition to performing stunts, she wrote on the subject for people who live in large buildings and worked with "The Evening Sun" to publicise her ideas, sparking conversation throughout the US.