An explosion at a lab lets loose onto the streets an army of mutated, murderous sharks and other creatures injected with a potent new stimulant.An explosion at a lab lets loose onto the streets an army of mutated, murderous sharks and other creatures injected with a potent new stimulant.An explosion at a lab lets loose onto the streets an army of mutated, murderous sharks and other creatures injected with a potent new stimulant.