Keeping both tones genuinely working
The tonal challenge of thriller comedy is not about splitting the difference between two genres but about finding the specific territory where both can operate simultaneously. A thriller that occasionally has funny moments is not thriller comedy: the comedy has to be structurally present, shaping character and situation, not occasional relief. A comedy that happens to have thriller stakes is not thriller comedy either: the danger has to be genuine enough that the reader feels it even while laughing. The writer has to find characters, settings, and situations in which both tones have room to operate, and then has to manage the scene-by-scene balance with precision. The Hiaasen model: fully realized comic characters who are also in real danger from antagonists whose menace is not undermined by their absurdity.