<human>: Can you condense the text into a few key points?

This happened two days ago only writing now because I was in the hospital with no computer. Being a small skinny guy I think to myself I should take some mixed martial arts classes, I can get buff, learn some cool moves to show off, and gain knowledge to defend myself. Well life decides to take a different route. So I show up for the class and we were learning ground fighting. Simple enough right? After learning how to properly fall to the ground our teacher moved onto take downs. The best way to learn is to see the move in front of you so the teacher uses me to show the class. He first grabs my leg and puts his head in my stomach to take me down. Everyone sees and trains this technique. Then we learn on how to counter this attack by creating a strong base with the leg he did not grab. Again we practice the counter move. Here is where it gets messed up. Now the teacher tells us how to counter this defense move. Once again using me as the test dummy. He goes in for the take down while I move my back leg to get a base, then he uses one hand to go towards my back knee to knock me down. Well it worked all right because his hand perfectly moved my knee cap out of the socket. Sweet Jesus it hurt. The funny thing was people thought I was joking until I pulled back my gym pants and everyone saw that my knee cap looked seriously injured. So an ambulance was called to take me to the hospital where they popped it back into to place. However, I am resistant to pain meds so they lifted me into the chair and popped it back into place while i felt every single nerve scream in pain. However, school is canceled this week ,due to thanksgiving, and now I can play Fallout 4 24/7 without anyone interrupting me. So WORTH IT!

Here is the pic Warning it is graphic.
<bot>: Took martial arts class to know how to defend myself, teacher dislocated my knee. So now I get to play Fallout 4 all week long.