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Today in things I never knew I wanted: A popcorn cannon.
Yes, they're real cooking vessels, not the practical jokes they sound like.
You add kernels and a bit of water to a mortar, seal it, heat it to build up pressure, then open it explosively into a catch sack. The kernels don't pop until the sudden pressure drop, when they all pop at once.
departures_arrivals on YouTube, "Amazing popcorn cannon (China)" [1:10]: https://www.youtube.com/watch?v=Ta5jh9VglDw
Related, that's not kettle corn, not at all. Kettle corn is popped in an entirely different kind of vessel:
Arnold Schrock on YouTube, "Amish man and wife making kettle cooked popcorn." [4:09]: https://www.youtube.com/watch?v=TxmIbhUaoeY
Lets Eat on YouTube, "Popping Popcorn in Chinese Style | Crazy Chinese Popcorn Cannon Machine | Chinese Street Food" [4:13]: https://www.youtube.com/watch?v=xkG_CxIttj8