White belt gets his arm broken at comp

A guy that I train with would not tap to a kimora at competition and got his arm broken just like when Frank Mir broke Antonio Rodrigo Nogueira's arm. He's brand new. He's been training for maybe 4 months. You guys see this a lot?

Edit: For further clarification, the guy had him locked in for what felt like a full minute. His corner was yelling for him to tap. Coach feels bad like he maybe should have intervened more but we all just tell him that the guy is a grown man and it's not his fault.