Press button, wings fold out.....looks good...wait for the green light (or equivalent on screen), and wait, and wait, and wait...
"Lock not confirmed", "Press it again then!" and wait, and wait, and wait.
"Still Lock not confirmed Sir"
"I can see that you idiot, what does the Book say?"
"Eerrrmmm. It says push the button again"
"Well do it!" - etc., etc.
Long silent taxi back to the gate...
Mac......