For most of you who owns the vinyl single this will be familiar the infamous hidden beat, if not. Go put out Royce Da 5'9" classic track "Boom" on and make your Nu-Mark go backwards. What you'll hear is a sample not bad at all. Is it a hidden beat? Is it a message from DJ Premier? Haha, somebody should make a dope beat out of that sample! For the digital boys, here you have the sound:
Royce da 5'9" - Boom (Instrumental Backwards)