The leader takes off his foot of her leg, placing his foot on her neck, telling Alex if he moves a inch closer to them he shall put pressure on her breaking her neck. Alex looks at the young girl and then back at the group and disappears before their eyes and reappears in front of the leader and hits him so hard in his stomach, the leader stomach rupture the moment Alex fist made contact, the force of the punch not only pushes the leader back making him fly it a wall, leaving behind dent, but the force also pushes back the rest of the group.
The punch made the group understand that this would not easy fight they could win and many of them started running away leaving behind their dying leader, but for Alex letting them run away was not a option Alex did not what they do after, but knew it was not going to good.