What was your most embarrassing fart?

I really don't want to admit it, but I will. In middle school, I had to attend summer school and I was in math class. Well, I was up at the blackboard writing a math equation when all of a sudden, you hear this sound. I knew it had come from me, but I honestly didn't think people would of heard it. I tried to play it off as something else, but when I turned around to go to my seat, people started laughing at me. I sat down so mortified that I put my head on the desk and didn't lift it up until class ended.