Well...let me try guessing.
It's a place. And I think it's either one of these Two.
(SPOILER)
The first one, althought I don't think it is, is END.
Considering how in END you start at the bottom of the map, and your enemies frequently at the top. That's when de "Party ouf of reach" comes in.
In this one, "Ignorance" can be taken as "Ignore Height". Even thought you can just jump away happily to the top, there are black/blank spaces at the map between your party and that big, 15T cliff that doesn't allow you to do that.
Even thought it wasn't supposed to be, you can still Fly or Teleport and give a shot at your enemies.

My other one, and I think it's the one. LOST SACRED PRECINCTS.
That's another situation when your party and Balk's are far from each other, but they can still shoot the hell out of you, triple attack by the tiamats, etc.
In this one, "Ignorance" can be taken as "Ignore height" as the previous one. There are black/blank spaces between both parties, and you can only cross by Fly, Teleport, jumping where therea re only two blacks spaces, or fight your way down to the bridge, where the behemoth is passing by.

Woo-hoo.