I ripped this last week on Shade 45, but haven't had have the time to upload it before now.
Shade 45 had a "Yelawolf 6Pack Special", where Yelawolf played six of his songs, "Throw It Up" was one of them, and he did a interview before they played it.
Listen Here:
http://www.youtube.com/watch?v=UH2IA94czTk
Quite interesting interview, it sounds like Eminem was really uncomfortable about doing the song and had to think about it for a long time before he finally made the verse.