"We got a couple joints coming from [Dr.] Dre, Eminem. We're just working. Fif is still working — he's working all the time. Oh, man. 50's a beast in that studio. You never know, it could be his last day [recording,] and he'll write the biggest record he ever did in his life. Or it can be his first day. When you look at 50, he has spurts. He has moments when he can write incredible records. ... He can come with that two or three big records, then fall back, then come with more."
http://www.aftermathmusic.de/_news/2008/01/index.html (German)