You often saw this motorcyclist in your city and became so bold that you began to wave at him. At first he didn’t notice you, but after 5 times he drew attention to you by waving back. A lot of time later, when you were walking home, you saw that motorcyclist. He stood in the parking lot and looked around. Noticing you, he waved to you, as if he had known you for a long time. Even through the helmet you can tell that he is smiling at you.