When the dwarf rolls 20 on perception

So, do you?

only on full moon days

Oh, must depend on how midget you are. I'm a freaking gnome when it comes to size, and I have night vision on every second day.

if you're short enough, you get a different atmosphere, with a different light source and every thing. this is where the phrase "hows the weather down there?" came from, as they were being serious. the phrase was later adapted into an insult.