I was 3,standing on a chair,I slipped and my chin landed on the hard part of a couch,luckily it didn't do any permanent damage just slightly altered my bite.Or maybe it was when I tried snow skiing down a steep hillwhen the ski got caught on a rock and I face planted on the hard,not soft,snow and rolled down the hill.GOD! why the hell was I not wearing a helmet?actually the helmet wouldn't help alot because I face-planted not face-headed