Whenever a mouse is in fear, it will show this very typical behavior by staying at one corner of the box, trying to not move any part of its body, and this posture is called freezing.
マウスが恐怖を感じる時の 典型的な行動がこれです 箱の片隅で 身動き１つしなくなります これは フリージングと呼ばれます