Lampshaded: "Is this the week to follow the tracks or go off them?"
Invoked: "Are we messing with the Game Master's plan again?" "No. I learn not to plan ahead any more than ten minutes."
Carol, while annoyed, uses the sudden swerve to practice her storytelling skills
Carol knows Bob will ignore everything she says especially the things she expects him to and starts giving good advice. The next thing Bob knows is his character doesn't like rocks or electricity. Now everyone blames Bob for taking the Idiot Ball (that Carol gave him in first place).
After having her intricate plotlines derailed too much, Carol gives up and runs module after module.
...Or she decides to just ban Bob after her patience runs out, something that ends up creating lot of tension among the remaining members of the group in a chain of events that lead to the eventual dissolution of it.