It would be so much nicer if people didn't breathe in their sleep. I mean, think about it: no more snoring, nose whistling, or even trouble breathing through your nose during the common cold. amirite?

It'd be cool if we could store oxygen in our bodies and tap into that when we needed it.

and no more people...

Also, no more having to wake up on a bitterly cold morning!! =D

FUN TIP: If you're sleeping with someone who is snoring, sometimes turning their head to the side will stop it. Or just plug their nose, which will wake them up, act innocent, and fall asleep before they do.