A joke about farting

Once upon a time, there was a man who smelled his fart, his blood pressure rose and he died.

Once upon a time, a man tried not to fart, but his fart exploded in it and he died.

Once upon a time, a man accidentally farted and poisoned others.

Once upon a time, a man accidentally farted and poisoned a room full of people, including himself, with the airflow in the air conditioner.