Applejack helped Pinkie Pie and Fluttershy with a funny vid they wanted to make. Pinkie Pie asked Applejack to wallow herself all in her own muddy pig pen until she was muddy. Applejack did what she was asked and covered herself all in very sticky thick layers of mud. Applejack was all covered and even her clothes where heavy from the thick sloppy muck.
 
After a good few times wallow in the mud Pinkie Pie showed Applejack the video she made of her.  
She gave the little vidoe title: Muddy Happy Farm girl. Applejack was very happy to help and very muddy too.  
Even Fluttershy and Pinkie Pie finding it very funny and cute to see their friend all muddy.