ballottement (noun)

1. The architect incorporated a unique ballottement technique by suspending a floating staircase in the middle of the atrium.

2. In the cartoon, the character used ballottement to find a hidden treasure by tapping different areas and feeling for the rebound of the object.

3. The suspenseful scene in the movie showed the detective using ballottement to locate a hidden microphone behind a painting by tapping the wall and feeling for the floating object.

4. In the anime series, the protagonist used ballottement to determine the location of a secret passage by tapping the walls and sensing the rebound of the hidden door.