My ex-bf from sometime back (we were together for 4 years) once did something which always comes back to me (whenever I see my eye in the mirror with a small scar above it!). We were volunteering supporting a youth pentathlon and my then bf was in charge of the shooting. I had never shot even an air rifle. He was a policeman and trained. He got me to demonstrate what they had to do, and instructed me to push my eye right up to the scope when I pulled the trigger. I obeyed and as he expected the gun (only an air rifle thing to be fair) had a kick back which knocked me right in the eye. He was pissing himself with laughter trying to tell the kids that was a great demonstration of what not to do, whilst the scope had cut part of my eye and I had put my hand to hide the blood and walked away pretending to laugh and burst into tears as soon as out of sight. I was left with a horrid black eye and all he could say was 'well that was bloody stupid wasn't it!' We split up shortly after! It happened over ten years ago but still to this day really sticks with me.