One thing about the MC system: a 20 is always a critical fail.
...suddenly, with a wet squelching sound, Ross disappears into the formerly hip-deep shit on the floor! he appears to have hit a deep spot! Only the tips of his fingers are visible, and while he won't drown right away, it's going to be pretty damn unpleasant getting him out of there. Although perhaps not as bad as being in his position right now.
What do, noble heroes?