How Would you feel

one time I was at my friends house and there was about 5 kids there. Then there was this one kid who my friend invited over, and no one liked him not even me. We would play games and jump on the trampolean and he would come in. We would tell him to get lost then we would start laughing at him and call him names. Then when he was on the trampolean we said to him to get off and he did not get off. My friend pushed him and he started to beat him up. I laughed at him and after that I thought what just just happened was wrong, I felt Guilty. I went to him and said sorry and he said it was ok, I thought what if that was me.