I said I would get this uploaded on Saturday and it's being uploaded at 3:50, Sunday morning...
Ah well, It's still Saturday somewhere in the world right?
This wasn't the original joke I was going for, but it just works better than the first one I had which was an old joke done many times which fit into the episode quite nicely. I decided this was the funnier one.
I still think that entire horror sequence was just in Pinkie's over imaginative head.
If you can't read the note it says:
"Hey Pinkie! Here's something for your next shindig, keep it somewhere safe where young hooves can't reach. Remember last time? Have fun!"
MLP:FIM belongs to Hasbro.