I fell over like every 10 minutes as a kid... but I haven't ever had any major injury. My most recent painful experience ('cause it's the most painful I can think of atm), is the other day when I woke up, and I had slept in a wrong position, so I could not turn my head to the right or lean it to the right without getting a stabbing pain from down behind my neck up to behind my right ear. (I worked on it and 2 days later it was back to normal [nearly], now I can move my head around but I sometimes get a very dull pain)