They run into a building

You pursue them into the city, the smell of living flesh igniting your predator instincts. You get closer and closer, your wheels giving you more speed than their tired legs.

They know that you'll catch them in a straightforward pursuit, which is why they duck into a dilapidated apartment complex. The front door lays on the ground, covered in dust and dried fluids, so you get in after them, rolling inside the dark creepy building.

With the Sun setting outside, the streets were already beginning to get dark. But inside, you are met with dangerous, gloomy darkness. Or, it would be dangerous and gloomy, if you weren't already dead.

You hear scurrying and shuffling sounds inside, as the two living girls try to stealthily run away from you. Their sound, their smell, and their heat overpowers your senses with lust.

Moans echo through the entire building. Dozens of ghouls slowly come out of their torpor, awakened by the presence of delicious living flesh.

This is a nest. They've run away from you, directly into a fucking nest.

This is bad. For them, obviously, because even if they manage to escape from you, someone else will get them, but it's also bad for you. If you don't catch them in time, other zombies will get the privilege of infecting these warm, pretty ladies. You have to hurry and find them.