Well I had a similar experience, only the sound was "natural"
In 8th grade about a year ago, We were taking an important test online. Like one of those Interm tests. It was dead silent. While doing it, I felt something going on in my stomache. Before I knew it, I did a huge fart that smelled. It was loud and it was hilarious. Nearly everyone laughed, and I held in my laughter. After we took the test, we were outside. The teacher went into the lounge, then all my friends laughed hard and began to tell me "WHY DID YOU DO THAT" The joke lasted some time.