When I was in college I crashed at this chicks sorority house after a date party. We were drinking champaign all night, and I woke up the next morning and it looked like I was pregnant or had cholora. I had so much air in my stomach, but had to piss. I knew I couldn't pee without letting out the biggest fart, so I told her I needed to take a shower. Well, it was a dorm style/share suite and was all tile so I knew it would echo bad. So I get I the shower, bend over, and put my finger over my ass to muffle it. It sounded like I was letting air out of a balloon. What made it worse was the last bit was a small shart, but it didn't matter too much because I was already in the shower. Longest fart ever, I guarantee it was at least 15 seconds, and after, my stomach was flat again.