|Creepy ass shit...|
Surely if you chewed pieces off then your limbs would be torn off as you bit into the voodoo doll, but what if you swallowed it whole? Would your body then slowly be burned by your own stomach acids from the outside all while the actual process was occurring in your own stomach? That would be pretty weird. Then when the digestion is complete the voodoo doll comes out on the other end, mostly undigested, but covered in feces nonetheless.
Would you then crap your own self out? That has to be a bizarre experience. No one can be sure what exactly happens when you eat your own voodoo doll, but I can imagine it's one of the worst ways to die ever.