<human>: I had this one friend named randy he was about 2 years older than me and a few grades a head of me. We were neighbors and best friends, always together,  always hanging out. 

Anywho, one day he became super upset with me for no apparent reason, he was being rude and calling me names, I got extrememly upset too.
After a while, I decided I'd play with this sister. Randys friend came over and as he was walking to his friend I was in his way, he pushed me and I landed on my bad arm (my right arm was broken at the time) which caused me to scream in such horrible pain. He quickly helped me up and apologized a million times, I didn't care anymore and hated him for being such a dick. 

The next day his sister invited me over to play tennis, I agreed and went over. We started playing tennis and randy came outside and decided he would play with us, I quickly decided that would be where I took revenge.

I allowed him to play, I knew he had had a broken finger and it still hurt him. 
We started playing, i served the ball first, i aimed for his injured finger and hit his finger with the tennis ball, he shook it off and kept playing, After a few minutes the game was over. He went and stood near his truck, we started talking. After a while I started to get upset. He pointed the finger he had broken at me, I took my tennis racket and hit his finger so hard the bone in it moved up, after that I walked away and said nothing to him ever again.

Could you distill the essence of the text into 1-3 sentences?
<bot>: This guy I used to be friends with was being a dick, pushed me and caused me to land on my broken arm. I hit his injured (not broken) finger with my tennis racket, causing the bone to shift upwards.