I was staying over at my friends and I was playing darts while everyone else was in the backround. And while I was about to throw it, one of the girls made a loud sound and it frightened me and i accidently threw the dart into the glass door (that was very close to the dart board). I was so shocked and it didn't feel like it was real.. I felt so bad and the girls were making me feel bad about it and I was so EMBARRASED :( I shattered the glass but it didnt completely fall, but they have booked an appointment with a glass repair man. The mum is paying for it and I feel so bad about the incident and I don't know how to tell my mum.. I'm only 13 and I was surprised that I threw the dart the hard to break the glass... I don't want my mum to yell at me or anything so should I just not say anything and leave it or what? Please help!