When Simon Hales, a 20-year-old university student, fell from a 20ft wall during a tipsy night out, nobody knew whether he would pull through. He'd suffered a horrific brain injury and would spend the next five weeks in a coma. Luckily, he did pull through, though nobody could recognise the newly awakened Simon from the old Simon. His mother told us that her son "evidently wasn’t Simon”. She loved him, she said, but “what I'm looking for is the son that I had to come back".