China's old-fashioned popcorn machine, the loud noise of popcorn, are interesting memories of many people's childhood in China, old-fashioned stoves, gourd-shaped pressure cookers, sacks ... Recently, this old-fashioned popcorn machine appeared on the famous popular science program "mythbusters" of the American Discovery Channel, and then this video was madly forwarded on Weibo. Many netizens said that they finally knew how raw corn turned into popcorn. Now it is hard to see such a scene.