<human>: **Overly Physical**

My brother is 15 and his whole life he was excelled in Martial Arts. He is known as "Black". I don't know why, he is white so it must have some deeper meaning behind it. 

I wanted to join my brother in Martial Arts to learn to defend myself. My mom allowed it and I went to my first lesson last night. The head guy in charge paired me up with my brother and he did not look happy. He told him to go easy and only do the basic routine for beginners. He thought it was best because we are brothers and I would feel more comfortable with him, which I did at the time. 

He completely ignored the coach and my brother, I don't even know how to describe it. He took my legs out from under me, rolled through and placed his leg behind my knee in between my thigh and calf muscle and started to apply pressure. I have never felt pain like that before. 

The coach pulled him off and said " What the hell is the matter with you Black?". He scoffed and walked off and this all happened last night. My calf is extremely sore and he spent the night at his friends house. I have no idea if I should tell mom or my sisters what happened. Because he should be home in the afternoon 

I am honestly afraid of him because it felt like he was trying to rip my muscle off the bone.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Brother was overly physical with me to the point where I feel like he was trying to rip muscles in my leg. Don't know if I should tell my family