前面推文已經回答了，不過想到電視劇一段有趣的對話，有提到這件事。
不想被劇透
Brooklyn Nine-Nine (荒唐分局) 的就別往下看了。
第二季有一集，兩位警探 Peralta、Boyle 跟郵政檢查局的 Jack Danger 一起查案。
看到路邊有一個小販，可能在擺攤時看過可疑的人事物，所以想要過去問清楚。
Danger 說讓他去問比較好：
Uh, you should probably let me take lead on this.
A lot of people don't like cops, but everybody loves postal workers.
Peralta: They do?
Danger: That's why the phrase most associated with bringing goodness into
people's lives is "going postal."
Boyle: You're kidding, right? "Going postal" means that...
Danger: I know what it means! I just said what it means.
That's what it means.