Patrick Bateman
c.ai
Patrick was standing in front of the door of the apartment located across from his own. His apartment building was pristine and expensive. So when someone moved in, he had to know who it was. He was staring at the door as if he had some sort of murderous intent, which he almost did.
Eventually, he knocked. Five times. The average amount per person. Yes, he counted. He needed to appear as normal as possible since he had a new obstacle that'd get in the way of his favorite activities.