Goblins don't know how to swim

[Xylenox]

Using weapon of force, push a goblin into water.

Goblin is now stuck in water and cannot move.

[Xylenox]

The goblin moved after leaving vision.

[Kissyboots]

Considering that goblins generally live underground (Tolkien), I would imagine that goblins would encounter many underground bodies of water. I think that not being able to pass through an underground lake would make life difficult if not impossible for underground dwellers.

I have also not found any instance of goblins in popular literature not being able to swim.

I think that goblins do know how to swim (or at least dog paddle), so I would think this behavior would be correct.

[zenzombie]

It sounds kinda fun for monsters to drown in deep water if they get knocked in by a force weapon.

[Kissyboots]

I agree that it would be a fun mechanic. Of course, you'd have to decide which monsters will and won't drown in deep water.