Unable to understand why?

When I was of 9, I went to one of my auntie’s place with my mother. I started playing cricket there in her lawn with her children. While batting, I hit a ball which directly went inside auntie’s room and broke the mirror of dressing table. It was one of the well furnished dressing tables at auntie’s place. Aunty started shouting on her own children. She didn’t say a single word to me. And started beating one of her son. He was beaten up so badly that he received a minor head injury and fever for four days. I felt very bad. I felt so bad that I decided not to play cricket again in my life! (Unable to understand where I went wrong?)
Though I never stopped playing cricket and still at the age of 24 I play with a passion of a child of 9 or 10 (in terms of enthusiasm not in terms of techniques, hehehe).
But the incident left such an impression on my mind that I decided not to do anything which may result into hurting anyone.
I always try my level best but somehow on a regular basis I hurt [unknowingly or for no reasons] someone very close to my heart. And the frequency is increasing day by day…(Unable to understand why?)
/