It was the crowd, rising to their feet when the ball was hit deep.
7 seconds sound clip from the Field of Dreams (1989) movie soundboard.
You can hear this line at 00:25:39.659 in the Blu-ray version of the movie.
Quote context
[...]
(Baseball bat hitting ball) (5)
- Right, you're a low ball hitter.
- Man, I did love this game. I'd have played for food money. It was the game, the sounds, the smells.
- Did you ever hold a ball or a glove to your face?
- Yeah.
- It was the crowd, rising to their feet when the ball was hit deep.
- Shoot, I'd have played for nothing.
- Oh, all the stadiums have them now. Even Wrigley Field.
- It makes it harder to see the ball.
- Yeah, well, the owners found that more people could attend night games.
- Owners.
- Mr. Jackson, this is my wife Annie and my daughter Karin.
[...]