Since it got to toilet humor...
You know that feeling when you're in a public bathroom and have diarrhea and you don't want the pushing fart-like sound to come out loud and expose you?
Well I once was in that position and remembered that there were other (rooms) there so the source of the sound won't be recognized... you know what that means
I'm the kinda person that can't hold laughing at things. With each explosion I let a laugh even louder. At the same time there were people talking outside. I wonder what were they thinking hearing loud farts an laughs coming from the bathroom at the same time.