One evening in 1912, a performance at the Opera House in Nacogdoches, Texas, was interrupted by shouts from outside about a runaway mule. The audience hurried out to see what was happening. Groucho was angered by the interruption and, when the audience returned, he made snide comments at their expense, including "Nacogdoches is full of roaches" and "the jackass is the flower of Tex-ass". Instead of becoming angry, the audience laughed. The family then realized that it had potential as a comic troupe. (However, in his autobiography "Harpo Speaks", Harpo Marx stated that the runaway mule incident occurred in Ada, Oklahoma. A 1930 article in the "San Antonio Express" newspaper stated that the incident took place in Marshall, Texas.)