Have you seen pictures of Olympic medal winners receiving their medals and facing an army of photographers? When the lights flash, many of them grab their medals and take a bite. It is a mystery why they do this. But it’s not always a good idea. A German sports star, David Moeller, bit his silver medal too hard and broke his tooth.

Biting a medal is common practice which has become a tradition in sport. So, the next time you are at a sporting event, watch closely what the athletes do when they receive their medals.

adapted from www.nbcnews.com