Star Trek plot lines play this out also, the ones where they tell the audience that there are 27 minutes of air left, and now there are 12.3 minutes of air left, as though that were cut and dry. On the other hand, Star Trek plot lines also usually involve taking the opposite extreme in actions to what your class exercise demanded. The captain nearly always risks 10 people to save one, and I can't recall a protagonist gunning down their compatriots to conserve air either. FWIW.