In American football, a runback is when a player catches the ball and runs with it after a kick-off or a punt.
A runback is an exciting part of the game, and it can change the score.
Examples:
The player made a runback after catching the ball.
The runback was very fast.
The runback changed the game.
The runback made the fans cheer.
The runback was the most exciting part of the game.
The runback was so good, it was on TV.