I had already felt I knew quite a bit about Under The Hat by Headcase. They had via Twitter been the most active in teasing about their mysterious play in the lead up to performance. It was all about what was under the hat and it wasn't a rabbit. I don't think I still know what was under the hat after watching the show. I do however know that a hat is not a mug. Based on case studies from 'The Man who Mistook his Wife for a Hat' by Oliver Sacks, Under The Hat explores the effects of different neurological disorders. They do this in an extremely clever and entertaining way, perhaps teaching the audience more through a lighthearted way than laying the subject matter on thickly. We therefore see a character who has no perception of things to their left who misses that moment of love from another character because of it. We have a character who is unable to stand upright and his doctors have to catch him from an endless spiral. Then there is Jimmy who is unable to live pa...