Twitchy tail telling her when something is going to fall. Breaking up into physical pieces and staying alive. Twisting her neck into a knot. The list goes on and on.

Why is this? Why can Pinkie do these things? Well, user Switch Swap posted in a blog what his headcanon of that is, and me and him together used it to make an entire collab story:

For those of you who would like to know Switch's answer to the ability question now, here's the link to his blog post: https://www.fimfiction.net/blog/901685/theory-of-pinkie

This story's tags very much work in combo. It's a highly emotional adventure full of mystery, then it comes bundled with an explanation for Pinkie Pie's crazy abilities!