The biped's head follows the movement of the ball.
Make the biped look around:
In this procedure, you make the biped look around as the ball bounces in
place.
1 Move the time slider to frame 200.
At frame 200, the period begins where the ball bounces in place.
2 On the Key Info rollout, click Set Key and set the Target Blend to 0.
3 Move to frame 199. On the Key Info rollout, click Set Key and set the
Target Blend to 1.
Making the Biped Look at Objects | 985