Thunder in the Sun is a 1959 western film directed by Russell Rouse starring Susan Hayward and Jeff Chandler.
The film is infamous among Basques for its misunderstandings of Basque customs, such as the use of the xistera a device of the jai alai sport as a weapon or shouting irrintzi ululations as meaningful communication.citation needed Other commentators, though, have noted the well staged action scenes, the absorbing story, and the excellent cinematography.The film was made by Seven Arts Productions and acquired by Paramount for distribution. It was the companys third film, after Gunrunners and Ten Seconds to Hell. ........
Source: Wikipedia