When characters in a humorous fantasy are subject to mundane laws and restrictions
This is when fantasy is played for laughs by presuming that no matter what is happening, the background standards of a civilized, law-abiding, highly regulated society prevail. The humor is that the juxtaposition is usually absurd- if any authority existed that could enforce petty rules and regulations, most of the scenerios of heroic fantasy wouldn't make sense.
**"But, as Frito saw with surprise, the Black Nine were halted at the foot of the crossing by a figure robed in shining rainment. 'Toll, please,' commanded the figure of the startled Riders."