Actually, should you ever get struck by a lightning bolt directly it would probably split your head open. But don't worry, you wouldn't feel a thing- just a quick zap!
If the lightning struck water in which you are standing, your head would probably be fine. In fact, what would most likely happen in that case is first your muscles would puff up, every hair on your head would stand on end, then your heart would stop from the surge of voltage. Although maybe you would suffocate first because your chest would be sticking out causing your diaphragm to freeze.
"How dreadful!" cried Lord Henry. "I can stand brute force, but brute reason is quite unbearable. There is something unfair about its use. It is hitting below the intellect." ~ Oscar Wilde - The picture of Dorian Gray