This happened to me in high-school.
One day i was in the library,sitting in one of those study cubicles. The library was fairly full.
I felt the urge, but tried to ignore it. It just decided it wasn,t going to go away.I thought it would at least be quiet.
Oh how wrong i was! I was seated on one of those really hard plastic school chairs thet have, so you can only imagine how loud it was!.
It reverberated off the chair and made a very loud noise. Much to my embarrassment, that was not all ! It also stunk really bad.
Well i tell you, there was no denying who did it, and i cleared out that entire end of the library.