There's a condition so bizarre and rare that most doctors haven't even heard of it - it's called Superior Canal Dehiscence Syndrome and it causes people to hear their blood moving, bones creaking, lungs breathing and even eyeballs moving. It can have a profound impact on a person's life and mental health. So can it be fixed? We go into a hospital operating room to learn about this little-known condition. Warning: this episode contains a description of a surgical operation.