well you should read it all, for informative goodness, of course.
Nothing happens. And I do mean, nothing. Apparently the instructions are written that way for a reason. bq. According to the nice lady from Jolly Time, a leading maker of microwave popcorn, the bottom of the bag contains a reflector that helps spread the microwave energy, which comes from the top of the oven, uniformly throughout the product. Turn the bag upside down and the popcorn will still pop, but it may take longer, and some of the corn may be dried out or scorched.