After a hard work on a building lot I want to smoke a cigarette. I wear work clothes. I wear only a blue overall like a professional and sitting on a kitchen unit. I ́m light sweaty and I deserving of smoking a cigarette. I want it and i do it and it is great. Casually I check the instruction manual. But what I have to do with the cigarette stub? I just stub out the cigarette with my sneaker on the floor.