Pinkie Pie: “Applejack, wait!”  
Applejack: “What’s wrong, Pinkie?”  
Pinkie Pie: “Aaaahhhhhhh!”  
Applejack: “What was that?”  
Pinkie Pie crying: “Oh, why did it happen to me?”  
Applejack gasps: “Pinkie! Why are you pee on my back!?”  
Pinkie Pie: “Oh Applejack, I’m so sorry! I was on my way to the bathroom but I was too late. My bladder can’t hold it anymore because I got pee all over and you made me do it.  
Applejack: “Aw, pony feathers.

oof :)

And after that Applejack gets the nickname Applejohn…

no no just no

@Deserter  
Well… Games up, gotta run, hope you like soaked apples! I think this is going up fast…

PIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIISSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

 
“Oh, that’s PISS apples, mate.”