Eminem, Proof, and the rest of D12 ripped a 20 minute freestyle for Tim Westwood back in 2004, and the audio hit the internet today.

You can fast forward to just after two minutes in to hear Eminem go off on the 'Drop It Like It's Hot' beat.

As a Eminem, and D12 fan, it's crazy to hear all of them in the same room.  Proof has been gone for a long time now, and D12 really hasn't done anything together in a while.

Hearing them share a mic, having fun, and doing what they do best is nostalgic.

Earlier this year, Tim Westwood dropped an even older piece of audio featuring Eminem and Proof.  The freestyle comes from 99 and it's equally as dope.  Check it out below.