Me, I never chipped my tooth in my life, but I've flicked my loose canine off when I was 13... and in the maths class I was in!!! I have a habit of biting my pen to shreds, and I just happened to play around with my pen, shaking up a VERY loose canine of mine.
So it finally flew off, right in front of my maths teacher. He was cool about it, and gave me a VERY decayed piece of black & white pebble
which was my tooth. The class had a good laugh at my expense...