Phineas Gage with the tamping iron that went through his skull and orbito-frontal lobe. The injury caused by the tamping iron was a freak accident that occurred while Gage doing construction work on a railroad in Vermont. The construction crew used explosives to clear rocks out of the construction site. The explosion propelled the tamping iron through Gage’s head. Though Gage didn’t seem to suffer any cognitive deficits as a result, his personality notably changed. Apparently, his eye was permanently disfigured.