Wikimedia Commons, Public Domain.
On September 13, 1848, when a 25-year-old man named Phineas Gage mistakenly ignited a blasting charge, a steel rod about 2 cm in diameter and about 1 meter long shot through his left cheek, took out his left eye in the process, went through his brain, exited through the top of his head, and landed some meters way. Amazingly, Phineas never lost consciousness and lived another 13 years. His personality changed for a while into that of a "foul-mouthed, ill-mannered liar given to extravagant schemes that were never followed through." However, even that aberration stopped after a short time and he lived a productive life and traveled widely. (Unit: 9)