"Only ex-cons and welfare mums work at that plant man."
Do you think that when he uttered that line, Michael Shannon's character was telling the ACTUAL truth to Eminem's character and that he knows for sure what kind of employees work there, or did he just want to tease and humiliate him for whatever reasons and mostly if not only just made it up.
Besides, don't some or even most ex-cons and mums or even other people from welfare work on plenty other jobs as well, why single out that plant?
And why did he also laugh at him for getting fired from a "pizza place", besides, who knows what the reason may have been, maybe it was not his fault at all?