translation.en: It entails an individual who, thinking they're alone, engages in some expressive behavior — wild singing, gyrating dancing, some mild sexual activity — only to discover that, in fact, they are not alone, that there is a person watching and lurking, the discovery of which causes them to immediately cease what they were doing in horror.
translation.zh: 它会找来一个人 让他觉得自己是一个人 然后让他做一些夸张的事情 比如大声唱歌，夸张地跳舞， 或者一些轻度性行为 当这个人发现 其实有人埋伏在看时 他会立刻停止在做的事情 非常惊恐