What is the worst thing...?

i would say burning to your death somewhere where you can't get out of...

 

Getting devoured by a sarlacc.

"Because most sarlacci inhabit isolated environments and rely on prey to stumble into their pit, they rarely feed. As a result, sarlacci have evolved an efficient digestive process. The stomach of a sarlacc slowly dissolves prey into nutrients in a painful process that can last for several thousands of years"

 

Wouldn't that just be dying from dehydration, just more painful?

 

I've always been afraid of losing finger/toe-nails. Losing them seems so painful, and I can't imagine how you'd hold anything to much effect as the pain seems unbearable.

 

somebody sawing off my dick with a old,rusty,dull, lawn mower blade and getting raped in my butt while it happens

 

That website is ridiculous, there is absolutely no source on any of those 'quotes'.

 

Getting your leg's chopped off.

 

North Korea labor camp
http://english.aljazeera.net/news/asia-pacific/2009/06/200968632442604.html