When I was 16, I got into a full blown fight with my friends 18 year old sister. I held my own at first, but she was relentless, and before long she was absolutely beating the crap out of me. When she was finally done, I was laying on the floor, crying and utterly humiliated. Three of my friends and two of hers witnessed this, and all of them were laughing hysterically at me the entire time.