The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

to unleash the MADNESS.
Money Heist Season 3, Episode 8

Madness. Madness and stupidity.
Game of Thrones Season 1, Episode 10

He was talking MADNESS.
Game of Thrones Season 1, Episode 1

Will you please stop this MADNESS
and go back to green apple?
The Big Bang Theory Season 6, Episode 2

This might be the first step
of my descent into MADNESS.
The Big Bang Theory Season 9, Episode 10