The jailhouse warden , armed with a Thompson Sub machine gun , threatens to electrocute all the prisoners if the riot does n't stop soon .
One of prisoners , Scarface Jones , retaliates by carrying dynamite .
The jailhouse warden , armed with a Thompson Sub machine gun , threatens to electrocute all the prisoners if the riot does n't stop soon , but one of them , Scarface Jones , retaliates by carrying dynamite .