Were he alive today, he would probably be sitting in prison or in a psychiatric ward for Haldane executed a plethora of dangerous experiments on himself and his son. He locked himself in small rooms to inhale deadly gases; he crawled through the carnage caused by underground explosions; he examined blood in order to understand the nature of human breathing. Today, more than 150 years after his birth, Haldane is considered one of the greatest leading respiratory physiologists and also as one of the biggest nerds of the scientific and intellectual life of his time.