In the first fight aganist the zombies (outside the tutorial dungeon), the PC's are sandiwched between the enemis. If I use a lightning attack, I end up stunning all.
Is it becuase the bow zombies also make the PC's wet?
Take a look at the ground. The first fight there is a puddle in the area. You basically start on the puddle. Also if your guys start to bleed (since skeletons don't bleed), their blood is also electrifyable.