You're facing the wrong way 你看错方向了

In a cinema, a lady turned round and said to the giggling schoolgirls behind her: "Do you mind, I'm trying to watch the film."

"In that case," said one of them, "you're facing the wrong way."

剧院里，一位女士回头对后面正在说笑的一群女学生说：“如果你们不介意的话，我想看这场电影。”

“要是那样的话，”其中一个女孩子说，“那您肯定是看错方向了。”