On the optician's steps

I heard the following story from him: Vangogue is working as a car attendant at Voluntários da Pátria, right in front of Asa. Suddenly, a loud whistle interrupts his singing with a client. He looks for where it came from, but can't find it. Once again, the whistle. He looks up, third floor of the Procopiak building. On the balcony, a guy rubs his hands, then waves and shows a package. Vangogue crosses the Alameda toward the building. The guy on …