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You have to pick:

Have one of your nostrils completely blocked at all times
 
or
 
Be only able to hop like a kangaroo instead of walking or running normally

 
Comments
whargolflorp

kangaroos save energy by hopping

andemon

Uh... That's how nostrils work, in case you haven't noticed.

One nostril rests while the other one does all the work. It's called nasal cycle and it alternates every two hours.

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