Complex sentence: Bleach does funny things to a person, when inhaled in large amounts it can create mild hallucinations and turn a normally responsible and civilized person into a raving lunatic, that was the case in this story.
Split into simpler sentences: Bleach does funny things to a person, especially when inhaled in large amounts. It can create mild hallucinations and turn a normally responsible and civilized person into a raving lunatic, that was the case in this story.