Ennis begins approaching Jack.
ENNIS: You been ta' Mexico Jack Twist? huh? cause I hear whut they got in Mexico for boys like you.
JACK: Hell yes I been ta' Mexico is that a fu*kin' problem?
The men, now opposite each other, have a face to face stare down, looking directly at, and into each other.
ENNIS: I'm gonna' tell you this one time, Jack Fu*kin' Twist. An' I ain't foolin', what I don't know, all them THINGS that I don't know, might get you killed if I come to know them. . . . . . I ain't jokin'.
After staring into his eyes for a long moment, Ennis turns, spits, and walks away.