Movies
You're my knight in shining armor. Don't you forget it. You're going to get back up on that horse, and I'm going be right behind you, holding on tight, and away we're going to go, go, go.
— Ethel · On Golden Pond

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Here the speaker is cheering someone on with affection and a nudge. Calling them a knight in shining armor is praise, and getting back on the horse is the familiar idiom for trying again after a setback. Riding right behind, holding tight, turns the encouragement into a shared adventure.
Context reviewed