I once was in Spanish class in college. You know how the teacher will say something, there is a pause and then the whole class repeats it back in tandem.
Well, the teacher say somthing like "como si fuera un millionaire." During the pause, I let the loudest fart of my entire life. Everyone was so distracted that they didn't even repeat the phrase back. I thought if I acted like I didn't hear it or notice no one would think it was me. I was wrong. Everyone was staring at me.