To enhance the surprise, it's best to place the punch line at the end of the joke.

提高意想不到的效果，就在笑话的最后抛出笑料，或者是一句画龙点睛的结语，这是最好的方法！

youdao

Thus the mean old joke that the best thing about Belgium is the ease of travelling elsewhere has been reversed, to the benefit of Belgian private Banks.

有个关于比利时人低劣陈旧的笑话，说比利时人最好的优点在于轻易地远走他乡，但针对比利时私人银行而言，情况恰好倒过来，这从而对比利时的私人银行有益。

youdao

Colin will be the judge of the best joke.

由科林评出最佳笑话。

youdao

This is the equivalent of a musician going out on a high note or the comic leaving the stage on the heels of his best joke, to the sound of applause from the crowd.

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Thus the mean old joke that the best thing about Belgium is the ease of travelling elsewhere has been reversed, to the benefit of Belgian private banks.

ECONOMIST: Private banking