Oh no, now you've done it. You've gone ahead and pierced your brain with a 3 cm thick steel rod. That's no good. But luckily you're not the first person to do so! And Phineas Gage didn't die until 12 years after he did, so you've got some time to kill.Today we're talking brain injuries. Mark has gone through the case of Phineas Gage who survived having a large steel rod cannoned right through his brain, though he didn't feel too alright afterwards. And Flemming will be telling us about Joe, the split-brain patient who started to suffer from alien-hand syndrome. It's about to get weird!