Managing to strike a punch to one of her assailants, Jennifer kicked the bracelet that was on the ground, towards Charlotte, hoping that by the time she transforms, she could get Miss O'Neil out of this mess. By the time the stranger managed to knock down the last one (unaware of Charlie's transformation yet again), he quickly put his sais away, and lifted the unconscious April, bridal-style, by the time a train passed through. "This way!", he told them, having to jump into the tunnel, and walk quickly besides the train tracks. 

Taking Charlie's hand, Jennifer wasted no time in following the stranger. If he knew a place where they would be safe from whoever attacked them, and possibly found out their intentions of exposing them, then the girls had to lay low. They weren't safe anymore.