On which side? The Persians did not too badly. :)
For argument's sake, let's say you are a Spartan.
it says i kill it, so i'm at no harm here
Polar Bears are an endangered species. So even if you come through unscathed (or were never at risk since you shot it with a sniper rifle), it still has a downside.
Either way, you'd probably end up dying. Great way to go out though.
Where should this comment appear?
This pairing only
Whenever "Kill a polar bear" appears
Whenever "Fight in the battle of Thermopylae" appears