Does nuclear annihilation hurt?
My first guess would be… a lot. According to 11 Steps to Surviving Nuclear Attack!, if you survive the initial explosion you’re in for massive burning or blistering, depening on how far you are from ground zero. There were survivors of Hiroshima and Nagasaki, who had long-term ill effects. These people survived Hiroshima, so they might give you some ideas about what to expect. Gregg Easterbrook’s The Smart Way to Be Scared [New York Times] has some tips for surviving terrorist attacks, including a nuclear explosion.