Well, I think it went like this:
I smell somebody's fart, so I think "Hey, might as well let a tiny one go myself. ... Hm, I'm not even sure if something came out."
Minutes later: "Bwoaf, what a smell! Who would do that? Oh well, let's get rid of some air now that it will get 'oversmelled'."
Etc.
The worst thing is that I dare not look the girl who sat next to me look into her eyes. Ever again. In the end it was just me and her left, so she has to know it was me.