He is a 'madman' out on the ski slopes. [=he is an extremely daring or reckless skier]
He drives 'like a madman'. [=he drives very recklessly]
a celebrity being stalked by a 'madman'
(..) The love she had for her children, I was a little awed by it. Reminded me of my sister. Oh. Oh, I see. You're a madman. I'm not here to trade insults. - Your sister was a strong-- - Don't talk about Cat! - I'll talk about whomever I want. - (grunts) (..)2016 TvShow: Game of Thrones Title: No One Season: 6 Episode 8