You call out is someone here?

You yell "Is there someone out there, help!". The only answer is the dry folded screams of the hungry dead. You have attracted six all together. They fumble at trying to climb straight up the roof after you. Some pull themselves up onto window cills before tumbling to the ground. You watch in horror as they keep this up for two hours without stopping to rest. Another one has joined them. This one looks like a fatal burn victim.