http://www.youtube.com/watch?v=YMandbEX_fo
If you go to 21 mins... around then you'll hear Kid talk about Em...
He says Em takes everything so literal, and if you were to say something about him he'd find out and hold a grudge forever

Kinda reiterates that some of the actions of his songs like 'Cleaning Out My Closet' etc. truly are real and that real guy too, holding that grudge.