Kyle unlocked the sim door and hollered for Chad and Casperto come out and give him a hand before running at the two battling boys.
He tackled the closest and who he figured was most likely to bring a knife into things, using his body to slam Marcus into the far wallandaway from John.  
"Get off me!" Roared Marcus, practically climbing over Kyle in his attempts to reach John. His knuckles were bruised and bloody, teeth bared in a feral snarl and eyes narrowed angrily.
Casper was next to appear, quickly taking stock of the situation and racing at John to keep him away from the other two.