"Oh shit," Spencer risked a glance upwards, and then put on a burst of speed, "Emily, RUN!"
The creature was coming down the fire escape rather faster then he liked, and he was beginning to think they wouldn't make it. "Faster, it's gaining too quickly."
He caught up with Emily, and Indigo shot past in a blur of blue-grey fur, leaping from the first floor platform to a tree before racing down the trunk and out into the garden. Spencer wouldn't have tried it for the world, but just then he really envied the cat his agility and speed. He turned the corner onto second, and looked up again. "Faster Emily!"