Humans excel at making assumptions about situations we don't understand. Almost a quarter of Canadians think homeless people are to blame for their circumstances and almost a fifth think their tragic flaw is laziness. You might think this yourself. But what if I told you that many people become homeless for the same reason Sidney Crosby was sidelined from the NHL? A recent study by St. Michael's Hospital found that almost half of homeless men suffered a traumatic brain injury (TBI) and that 87 per cent of those injuries happened before the men lost their homes.