24-yr-old Brazilian construction worker Eduardo Liete survived after a 1.8 meter iron bar fell off a building and pierced his hardhat and his skull, exiting between his eyes. He was awake through the whole thing and told doctors it didn't even hurt!
http://www.whatsonshenzhen.com/news-3629-brazilian-builder-eduardo-leite-survives-after-being-pierced-through-head-by-6ft-pole.html