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'
(..) You see a Middle Easterner on an aircraft and you just assume that he's hatching some violent plot? Allison Burgers is a persecuted dissident, not a murderous madman! He was reported saying, "Let's take out the guards at the Lancaster." Guess what? We deliver to the Lancaster! Good one! (..)2012 The Dictator