Two white men dressed in white and black Tae Kwon Do uniforms , competing with each other on a green and red matt while a team of onlookers watch .
It is probably the case that a group of men start fighting and a leg is broken .
It is impossible that a group of men start fighting and a leg is broken .
It is probably the case that a group of men start fighting and a leg is broken .
A group of men start fighting and a leg is broken .