If you pick up a sleeping gnarling and drop them, sometimes they act as if they are still asleep while walking around
In one of the custom campaigns I picked up a gnarling who was asleep but angry about not being paid. I dropped him on the vault but when he moved towards the gold he was still lying down and no animation played.
As a side note, sometimes minions such as the cultist can be working in their room right next to a brimming vault that has been that way for ages, yet be angry about not being paid.
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