This is the reason you always see professional fighters tap out.

It seems that the pros know when to tap out. It's a known thing that if you don't, your arm (or other parts of your body) can't withstand the pressure that is being put on them, and they WILL break.

I'm fairly certain that this guy, if he ever fights again, will tap at the drop of a hat from now on.

His opponent has him in a Brazilian Jiu-Jitsu hold where his arm is obviously not in a good place. Sometimes you have to throw pride out of the window.

WARNING! GRAPHIC CONTENT! If you don't like the sight (or sound) of broken bones, you might want to look elsewhere.