Emma Ginder was teaching on Zoom when her class heard what sounded like her passing gas. She admitted playing a fart sound to lighten the mood, apologizing for having the maturity of a young boy.

The video was created in December 2020, while U.S. schools were forced to close and conduct classes remotely due to the COVID-19 pandemic. But the "fart" was a prank — a sound effect used by a ...