Can some please tell me why his rig does this and how to fix it?

I was watching a video when

Who up Mimicing they secrets rn?

Mimic Render

#SoTMHype

"Bazinga!" Ass Freddy

A new FNaF 2 Movie Poster!

THE ONE YOU SHOULDN'T HAVE KILLED

Golden Freddy Render

Endo progress/first Freddy reveal

One of the stars of the animation - Burnt Springtrap (Precursor to Scraptrap

I was looking at FNaF products, and I found an official Withered Classic Freddy