If you use an air-popped popcorn popper, keep filling it with kernels until you have a large, almost-8-liter bowl filled.
Divide the popcorn into about 4 or 5 large bowls and have 4 or 5 sets of willing, stirring hands on call, if possible
Bring the other ingredients to a boil over medium heat and keep the pan at a medium boil for 5 minutes, stirring constantly.
Quickly pour the caramel evenly over the 4 or 5 bowls of waiting popcorn, and ask eager, waiting helpers to quickly stir each bowl, being sure to evenly coat all the popcorn as best as possible with the caramel.
After spreading coated popcorn onto 2 roasting pans, bake it at 250 for 1 hour.
Break it apart when it's still warm, right out of the oven.