I did this a few months ago, it might have spelling errors here and there (for example “appearantly”, i know now thats not how you spell it, i’m just too lazy to fix it)
 
So why did i make this image you might be asking yourself? Well, my main fetish is facesitting (and next to it is buttcrush) and I made some “bad” facesitting on spike images in the past and i at some point discovered that I like “shotacon/foalcon facesitting/buttcrush” so thats why i decided to make a buttcrush image with Rumble being the one sat on my one of the mares who are older than him. And at that time I just really liked Starlight Glimmer so thats why I made her sit down on tiny Rumble’s face and came up with a little story as well (which you can see, Twilight has been using Rumble’s face as her cushion for a long time, so Rumble already (but only) got facesat/buttcrushed by her).  
Oh yea and farts are part of it as well.
 
I might maybe do more of this if you want. And even if you don’t, I’m still gonna do it :P

imported from https://derpibooru.org/images/1591417