Short story: Met up with some Imperial soldiers and one guard was blabbing about how "he's still sore from where the arrow hit him". He must be fresh out from the hospital. Is this a new guard comment? Is this based off "I took an arrow in the knee" line?

No. that's nothing new.

Damn. Was the first time I've heard it.

It's a shame such an innocent, if abruptly ended line, got dragged into the ground..

I know. It's actually quite a good line, gives a good insight into the type of people who guard the cities - as in, those who aren't really fit for proper adventuring. Makes it clear how such people aren't really suited to protecting against a dragon attack and so makes the players role all the more important in ending the threat.

A good line! Now reduced to an infuriating meme...

That line used to be innocent before it took an arrow in the meme.

Hahahaha