Friday is a an excellent day to go to the movies. It's the end of the week and you may be tired from work, but don't feel like staying in, so you'll head to the nearby theater to catch a flick. And while you're there you'll treat yourself to a nice bag of piping hot popcorn. As a matter of fact we should all treat ourselves to an airy handful of buttery, salty popcorn because today is National Popcorn ...