John Litel and Steffi Duna were listed in a Hollywood Reporter production chart, but they did not appear in the movie. Jack Richardson and Tom Wilson were in studio records/casting call lists for this movie but are not seen. Wally West is listed by a modern source as a croupier, but the only croupiers in the movie were played by Stuart Holmes and Jack Wise.
Eddie Foy Jr. ran as fast as he could in the scene in which he was slightly undressed, because it was cold and Mexican women and children were taunting him.
Ronald Reagan, as a lieutenant in the U.S. Army Reserves and a superb horseman, insisted on doing his own riding and stunts.
Because Reagan did not believe a book in his breast pocket could stop a bullet, it was tested by firing into the book with an ashtray behind it. The ashtray did not break.
In interviews during his presidency, Ronald Reagan called this movie, "the worst picture I ever made" and also said, "never has an egg of such dimensions been laid". He recalled that a movie usher who had seen the film once told him, "You should be ashamed." However, the film did have one positive effect for Reagan. After seeing the movie, a young man named Jerry Parr was inspired to enter the Secret Service. On March 30, 1981, Parr was the agent who quickly pushed Ronald Reagan into his limousine when John W. Hinckley Jr. fired six shots at the President outside the Washington D.C. Hilton. Parr's quick reaction, and his decision to take the wounded Reagan immediately to George Washington University Hospital, were credited with saving the President's life.
The footage of the opening street scene of the Mexican town was previously used as the opening scene of the border town in Bordertown. A short section of the same scene was later used during the opening Mexicali sequence in The Hitch-Hiker.