Well, there are several ways of manufacturing air. Since air is just a mixture of gases, in the case of Earth, that most life breathes, one only has to create a similar mixture. (Earth's air is made [mostly] of Nitrogen, Carbon dioxide, Dioxygen, Trioxygen, Carbon monoxide, and Dihydrogen monoxide.)
you try to swallow air without closing your mouth... try it... but it won't work if you shut your mouth
Echoes
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Closing the mouth of an inflated balloon helps to keep the air trapped inside. If the mouth is left open, the air can escape and deflate the balloon. Closing the mouth also helps to create pressure inside the balloon, keeping it inflated.
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When using a drinking straw, the volume of air in your mouth generally decreases as you create a vacuum to draw liquid up the straw. This action pulls liquid into the straw while simultaneously pushing out air from your mouth. As a result, you are effectively reducing the amount of air in your mouth to facilitate the drinking process.
When you create a vacuum in your mouth by sucking on the straw, you lower the air pressure in the straw. This pressure difference causes the liquid to rise up the straw and into your mouth, allowing you to sip the drink.
Create a fire blaster and shoot yourselve up on to the air
vibrate your lips on the mouth piece using the air that passed through them into the instrument
You need to create a difference in air pressure between the inside and outside of the straw for air to come out. By sucking on the straw, you create low pressure inside, causing the atmosphere's higher pressure to push the air through the straw and into your mouth.
Molded around the end of a didgeridoo to create an air tight seal from the players mouth to the instrument.
Shout yell scream bellow Suck in all of your air, then use your abdomen to push all the air out with will create a really loud scream if it's done properly Breathe deep in through your nose, then out through your mouth. Repeat, but instead of breathing out of your mouth, talk out of your mouth. For maximum effect, yell out of your mouth.