This is a very easy trick to do with an empty water bottle. Twist the bottle as much as you can, hold it with one hand, and then use your thumb to quickly twist the cap off. The cap should fly off and pressurized water vapor should come out of the bottle. A fun thing to do with an empty water bottle. It works best with the thin water bottles but can also be done with other type. Most people probably already now this but I'm sure some people don't.

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