1. Swigging some liquid nitrogen would probably freeze your teeth (and your entire mouth) pretty good. Also, things tend to crack when heated/cooled rapidly, so immediately afterwards if you were to take a sip of hot coffee, your teeth would indeed crack. And your entire lower jaw, too.
2. The easiest way would be to remove all smoke detectors. If one doesn't know something's burning, then it would increase the chances of it spreading to the rest of the house before being put out - IF it's put out.
2. The easiest way would be to remove all smoke detectors. If one doesn't know something's burning, then it would increase the chances of it spreading to the rest of the house before being put out - IF it's put out.