Courses: P3, P13
Pour a very small amount of water into a syrup can. Bring the water to a boil and let boil for a short time to allow the steam to expel all the air. Remove from heat and simultaneously cap the can tightly -- use channel lock pliers to make sure the lid is very tight. As the water cools and re-condenses, the can will crush.
Safety: provide leather gloves, not the cryo gloves shown in the video.