Extra Senses - Balance

You may think that humans only have five senses, but in fact we have many more. Graham Easton delves into the extra senses that we take for granted, from our sense of balance to our sense of time. Graham attempts to master balance by taking a lesson with the English National Ballet. He has a dizzy moment in the balance lab at Charing Cross Hospital, and finds out why alcohol can put you in a spin. But what happens if your balance systems goes permanently astray? Steve Geary has a rare condition which affects his sense of balance and means that he can hear his eyes squeak.