At this point we were laughing so hard we could barely breathe . You know , those laughs where you start laughing a really high - pitched laugh that sounds so uncool when you 're a teenager but you ca n't stop anyway . Then the smoke started .

Question: Why did the smoke start filling the room ?
Answer: She was blowing smoke .She was smoking a cigarette too hard .One of the girls dropped her cigarette on the carpet .None of the above choices .