Marcus turned around. "Oh, those mutants that came in with you? No, no. They haven't. Probably not even sure how to do it... say, why are they coming over here? Woah, they seem pissed, tadpole..."

The Master looked for escape routes. He could run back up the stairs or hide in the crowd to avoid the trio, and he could probably bust out of the prison if he wanted to. The main gate would require too much force to break down, but he remembered seeing a grated window that seemed pretty old. Perhaps he could bust that down. But then there were the guards at the perimeter, who would probably shoot him if he tried to run. Plus, he was able to hear the sound of engines in the distance meaning that they likely had a jeep or some other vehicle (or vehicles) patrolling the perimeter. 

The three mutants were closing in. He could either make a break for it, or see if the fighting rules were true.