One of my fondest memories growing up was having "movie parties" with my grandparents. A particular movie or television show was scheduled for a certain night while I was visiting (no video stores in those days!), and bowls of various snacks were placed all around. A particular favorite of mine was Jiffy Pop, the self-contained popcorn container you popped directly over the stove. Of course, it didn't pop as quickly or evenly as the commercial suggested (shocker!), but it was so much fun to watch, once it got going. This was the sort of pre-game activity reserved for a bigger cinematic event, such as The Wizard of Oz.
A quick search shows that Jiffy Pop is still for sale, via ConAgra, though I didn't see it available at the store I regularly shop at. I thought about Jiffy Pop for the first time in a long time when my wife popped popcorn on the stove instead of the microwave (for a project). A bit more history can be found here, including pop culture references (I love the Simpson's joke).