墙倒众人推 meaning in English

when a wall is about to collapse, everybody gives it a push -- everybody hits a man who is down.; everyone gives a shove to a falling wall.; everyone hits a person who is down.; when a man is going down-hill, everyone will give him a push.; when a wall is falling, all push it -- to take advantage of other's frustration.; if a wall starts tottering, everyone gives it a shove