I was in my jiu-jitsu class, that is on an academy.
I just ended my training and i was going to sit, the a fat kid bumped on me and i fell down and when i was trying to hold the rope, my hand slipped under it and my finger got locked on a ''machine'' where a woman was running, i don't know it's name but it has 2 iron bars at left and right, where you put your feet and a wheel on the middle, and when you move the iron bars back and forth you spin the wheel.
And then a piece of skin got out of my finger and my inner fingernail appeared...
I can't move or touch anything with this finger, if i do it hurts a lot.
