Horn visited the United States briefly when his shipwrecked and was towed to New York City. He returned home to Bremen before returning to the sea as a waiter, where he met Siegfried Fischbacher and launched his performance career.
While performing aboard the ship he met Horn and asked him to assist him during a show. Fischbacher and Horn were fired from the TS Bremen for bringing a live cheetah onto the ship, but were scouted by a cruise line based in New York, and began performing together as a duo.
The owner of the Astoria Theatre in Bremen saw Fischbacher and Horn’s act aboard a Caribbean cruise ship and recruited the duo to perform at her nightclub. This launched a career for the pair on the European nightclub circuit, and they began to perform with tigers. They were discovered performing in Paris by Tony Azzie, who asked them to come to Las Vegas in 1967. They spent some time in Puerto Rico and may have purchased property there.
In 1981, Ken Feld of Irvin & Kenneth Feld Productions started the Beyond Belief show with Fischbacher and Horn at the New Frontier Hotel and Casino.[ A revamped version of the show was taken on a world tour in the third quarter of 1988.
