In my game, the mold encounter provided some much needed comic relief! The way the party decided to get past the mold was to make a mad dash around it. the barbarian went first, suffered the subdual damage but was fine.... the next three players head first in fungus as the damage knocked them out! Luckly they had a rope tied to each member (the funny part was imagining the players taking a face first dive down the slip and slide that was the mold!)