My dear little nephew must have a head as hard as rock. He threw himself backwards today and landed right on my head. Well behind my ear anyway. My head has been hurting since. It was so bad driving along that I actually had to hold my head as we went over speed bumps. It didn't occur to me at the time to go over the bumps slower It feels like my brain is moving around inside my head!
Still, I guess this reminds me of a hangover but without the drink!