Tandem walking whilst bouncing ball (Balance, tandem walking, bouncing a large ball)

Stand up straight with a clear path in front of you.
Imagine a straight line on the floor extending away from you, or place a straight line of tape along the floor.
Walk along this line on the floor as if you are walking a tightrope.
Bounce a ball with one hand whilst trying to keep walking in a straight line.
Ensure you keep your posture throughout this movement.