In a room, Ibura can create invisible barriers that are tangible but cannot be seen or detected by any means other than touching them. Ibura creates one such barrier and stands behind it. Now, Kaori, who doesn't know about Ibura's power, enters the room with a ball in her hand. She throws the ball straight ahead, where the invisible barrier is. What happens to the ball, and how does Kaori's understanding of the room change based on the ball's behavior?
Provide a very brief response.
When Kaori throws the ball, it unexpectedly comes to a sudden halt in mid-air as it hits Ibura's invisible barrier. Since the barrier cannot be seen, from Kaori's perspective it would appear as if the ball hit an unseen object in the air. As a result, Kaori would conclude that there is some unseen obstacle in the room, although she wouldn't be able to perceive the nature of it without further interaction, such as touching where the ball stopped and feeling the barrier for herself. She may be confused or surprised by this unanticipated event but would likely investigate further to understand what stopped the ball.