Young Guns II (1990)

On New Mexico Governor Bill Richardson's last day in office, he discounted any and all claims of Brushy Bill Roberts claim to be Billy the Kid

Deputy Carlyle. Which of you is the leader of your gang?
William H. Bonney. That'd be me.
Arkansas Dave Rudabaugh. Arkansas Dave.
William H. Bonney. You are not, Dave!
Arkansas Dave Rudabaugh. I am so!
William H. Bonney. You are *not*!
Arkansas Dave Rudabaugh. I am *so*!
William H. Bonney. Are not!
Deputy Carlyle. Gentlemen!

When the gang is surrounded by Garrett's men, Billy cocked same gun two times. First time when he pointed it toward Dave, and second time just a second before Doc ran outside.