Going steadily viral on social media, the video shows a sewer hole exploding in a man's face after he drops a cigarette butt inside it. The incident is believed to have taken place in Tehran, Iran. In the footage, a man can be seen stopping over a sewer hole and dropping a cigarette butt inside it. Immediately after that, a massive explosion takes place as the hole blows up right in the man's face. Fortunately, he is seen to have escaped mostly unhurt..