Everything that was written here about who gets burned and when is incorrect.
Go here:
read everything on page 4.You will get all your answers with undeniable evidence there.
As for the guy who has his face melted away completely - that is Milburn. If you look at the photo - the man has no face at all. NONE. His glasses are melted with everything else - so it is not a stupid movie due to that. Everything is logical.