What do you call this Chinese Popcorn Cooking mechanism? In this video they have this really cool popcorn pressure cooking thing,
Chinese Puffing Gun

You can see one for sale on dhgate for $600



You can see it in use here


https://www.youtube.com/watch?v=UiD3YJD2RVU
https://www.youtube.com/watch?v=baQT0pwvXKQ