A traditional Chinese popcorn cannon. Basically an old-fashioned pressure cooker that blasts popcorn out once the pressure is abruptly relieved.
https://www.youtube.com/watch?v=Ta5jh9VglDw
Previously:
https://www.homemadetools.net/forum/...759#post108366
https://www.homemadetools.net/forum/...7284#post85416
