20 years ago, before he was a rap icon, Eminem sharpened his rap skill set with battle raps, cyphers and radio freestyles.

Over the weekend, an on-air cypher on Baruch College Radio’s Solo Vibes radio show hit the Internet.

The freestyle came roughly one year after the release of his indie debut album, Infinite, and a little over a year before the release of his mainstream follow-up, The Slim Shady LP.