Johnson had been opening for Stevie Ray Vaughan and Double Trouble that night at the Dallas venue, right in the middle of Stevie's tour supporting his 1984 album Couldn't Stand the Weather.

[ Cheers and applause ] -Evening, ladies and gentlemen, welcome to to El Mocambo. Boogie time tonight, please welcome from Austin, Texas, Stevie Ray Vaughan and Double Trouble. [ "Testify" plays ...

As the track picks up intensity via Vaughan's raucous chordal solo, Chris Layton's drum fills, and the addition of the #9 to the Eb7 chord by both Vaughan and keyboardist Reese Wynans, Shannon holds ...