On which side? The Persians did not too badly. :)
For argument's sake, let's say you are a Spartan.
Either way, you'd probably end up dying. Great way to go out though.
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.
Where should this comment appear?
This pairing only
Whenever "Fight in the battle of Thermopylae" appears
Whenever "Have one of your nostrils completely blocked at all times" appears