Well, he has to find higher ground before that rabbit comes for him and Crowley as well. The question is: which place to hide, where the rabbit can’t jump high enough to catch them.

“Um, right, finding a place to hide,” human Harry goes around to find a hiding place when he gets an idea of possibly going up the rooftops to escape the evil rabbit’s clutches.

“Hey, maybe we should go on the rooftops so he won’t try to jump up and catch us,” he suggest to Crowley, “I could try to teleport ourselves onto one right now.”