But when I say " crazy people" , I mean people who are mentally disturbed, or, have something really wrong with their brain.

但，当我说「疯狂的人」，我是说那一些真的有心理疾病的人，或是，他们的脑子真的有问题。

Someone who writes birthday greetings to his daughter on the inside of an unpeeled banana must be mentally disturbed.

有人把给女儿的生日祝福写在一根没剥皮的香蕉里面，一定是精神错乱了。