Note: You need to be fast when you begin to enter the city for this trick to work. When you enter the city, run and open the door. Kill anyone who gets in your way (but not the townspeople). Turn right and go down the steps. Kill the two aliens and you should be near the bridge. Wait at the building for a woman to come out, then run inside. Go to the chair in the room and there should be a rabbit holding a gun. Do not get him angry, (or shoot it), as it will chase you around. Also, you cannot kill it.