Fluttershy farted loudly. She can be quite gassy, and secretly finds it fun to fart, and fortunately no one was close enough to hear her.
I know some people would love seeing her farting in an outfit like this which I drew over her wetsuit, but as I said in my other edit, I won’t be taking requests that involve changing outfits, this took a while to do and I had planned on this for some time.