Pittsburgh linebacker James Harrison collapsed the pocket and knocked the ball loose for teammate LaMarr Woodley to pick up and return 7 yards for a score . " I just have to take care of the ball , " Flacco said afterward . " If we can take care of the ball there , it 's a different story but it happens .
According to the above context, answer the following question.
Why was James Harrison motivated to knock the ball loose ?


James Harrison wanted to get possession of the ball .