Pace wound up hitting Manning from behind after Manning had run into running back Brandon Jacobs near the line of scrimmage. The force of Pace's hit wound up forcing Manning's helmet off his head, and the quarterback then ran into Jets safety Jim Leonhard. The left side of Manning's head was cut open, and blood spurted to the ground before Giants trainers applied a compress.
"It's just football," Pace said after the game. "I don't care if you're playing against your fiercest rival, but things like that happen. If your helmet comes off, anything can happen. I wasn't trying to be malicious."
Manning actually took the blame for the play.