Twizzlers' current ad campaign says you can't be serious with Twizzlers, and shows serious-looking people being manipulated into smiling and laughing via prodding with a Twizzler. So how about kicking it up a notch, like so?
At the state funeral of a dictator from a totalitarian regime, everyone is forced, under penalty of death, to comport themselves in a somber and mournful manner. And we focus in on one particularly serious- and thoughtful-looking mourner, and then the guy next to him prods his face with a Twizzler, and he smiles and starts laughing, which outrages the regime, and the man is immediately arrested and sentenced to death.
The following morning at dawn, the man who allowed himself to evince a break in his mourning at the state funeral is woken up to be executed by firing squad. The guards lead him to the place of execution where he's tied to a post. The official in charge asks if he has any last request, and he asks that everyone present is given Twizzlers, which they are. And once they get the Twizzlers, the firing squad and the officers commanding them all break out in smiles and laughter, and having such fun, they decide to untie the condemned man let him go. And after he's untied, he is handed a Twizzler, and he bites into it and smiles and laughs.
(Other possibilities for this even sillier ad campaign could include a murder investigation with the victim's family present, and a stuffy award ceremony where some extremely serious professor is presented with a medal or award for outstanding lifetime achievement despite years of various and continual hardships.)
Here's an example of the Twizzlers "You can't be serious with Twizzlers" ad campaign:
https://www.ispot.tv/ad/wZxP/twizzlers-you-cant-be-serious-beard