This is an old story, but interesting. The person was a construction worker. There was an explosion and an iron rod went through his skull. but furtunately and amazingly he survived.

An Iron Rod penetrates the Skull.

It is simply amazing that he survived this huge injury. He must have bled a lot. Medically infections should have been an archenemy in such an injury.

People said that he is not him anymore. His behavior and personality was changed. Thus the damaged area (thought to be frontal lobe) is responsible for behavior and personality.