The boot on the other foot: There are certain preconditions for a suitably riotous "invasion." An effective hellraising ringleader is essential, and the accomplices must provide plenty of vocal encouragement, clapping and giving shouts of appreciation.
洞房要鬧得起來，有些先決條件：會起鬨的主角不可缺，還得加上旁人做音效，鼓掌、大聲叫好。